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271 vulnerabilities by discourse
CVE-2026-34947 (GCVE-0-2026-34947)
Vulnerability from cvelistv5 – Published: 2026-04-03 21:27 – Updated: 2026-04-07 14:17
VLAI?
Title
Discourse: Staged user custom fields are exposed on public invite pages
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, staged user custom fields and username are exposed on public invite pages without email verification. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
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CVE-2026-27481 (GCVE-0-2026-27481)
Vulnerability from cvelistv5 – Published: 2026-04-03 21:27 – Updated: 2026-04-07 14:18
VLAI?
Title
Discourse: Hidden tag visibility bypass on tag routes
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass vulnerability allows unauthenticated or unauthorized users to view hidden (staff-only) tags and its associated data. All Discourse instances with tagging enabled and staff-only tag groups configured are impacted. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
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}
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CVE-2026-33415 (GCVE-0-2026-33415)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:42 – Updated: 2026-04-03 16:21
VLAI?
Title
Discourse: Improper Access Control in discourse-ai Allows Unauthorized Category Content Exposure
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authenticated moderator-level user could retrieve post content, topic titles, and usernames from categories they were not authorized to view. Insufficient access controls on a sentiment analytics endpoint allowed category permission boundaries to be bypassed. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-284 - Improper Access Control
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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CVE-2026-33300 (GCVE-0-2026-33300)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:42 – Updated: 2026-04-01 18:34
VLAI?
Title
Discourse: Hidden group names and access metadata are exposed to moderators through the `category-chatables` endpoint
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass in the Category Chatables Controller show action allowed moderators to get information on hidden groups names and user count. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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CVE-2026-33185 (GCVE-0-2026-33185)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:41 – Updated: 2026-04-01 13:47
VLAI?
Title
Discourse: Group SMTP test endpoint susceptible to SSRF
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, the group email settings test endpoint could be used to make the server initiate outbound connections to arbitrary hosts and ports. This could allow probing of internal network infrastructure. The endpoint was accessible to non-staff group owners. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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"timestamp": "2026-04-01T13:46:51.051012Z",
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}
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"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-918",
"description": "CWE-918: Server-Side Request Forgery (SSRF)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-31T17:41:44.893Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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},
"references": [
{
"name": "https://github.com/discourse/discourse/security/advisories/GHSA-5976-77mj-m4h3",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/discourse/discourse/security/advisories/GHSA-5976-77mj-m4h3"
},
{
"name": "https://github.com/discourse/discourse/commit/e75cf456e8e318290c569bd6e8fa0f2586ffc530",
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"x_refsource_MISC"
],
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}
],
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"advisory": "GHSA-5976-77mj-m4h3",
"discovery": "UNKNOWN"
},
"title": "Discourse: Group SMTP test endpoint susceptible to SSRF"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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CVE-2026-33074 (GCVE-0-2026-33074)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:41 – Updated: 2026-03-31 18:52
VLAI?
Title
Discourse: Vulnerability in discourse-subscriptions plugin allowing users to self-grant to higher tier subscriptions
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, a user may be able to purchase a lower tier subscription but grant themselves the benefits that comes along with a higher tier subscription. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-33074",
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{
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},
{
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}
],
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"timestamp": "2026-03-31T18:50:09.413946Z",
"version": "2.0.3"
},
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}
}
],
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},
"title": "CISA ADP Vulnrichment"
}
],
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{
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"vendor": "discourse",
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{
"status": "affected",
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},
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},
{
"status": "affected",
"version": "\u003e= 2026.3.0-latest, \u003c 2026.3.0"
}
]
}
],
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{
"lang": "en",
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}
],
"metrics": [
{
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"attackComplexity": "HIGH",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
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"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
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}
}
],
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{
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"description": "CWE-269: Improper Privilege Management",
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}
]
},
{
"descriptions": [
{
"cweId": "CWE-285",
"description": "CWE-285: Improper Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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},
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{
"name": "https://github.com/discourse/discourse/security/advisories/GHSA-9vg5-mp49-xghh",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/discourse/discourse/security/advisories/GHSA-9vg5-mp49-xghh"
},
{
"name": "https://github.com/discourse/discourse/commit/c34f2aac8dcd1ae2886fa84256f607bc003f9d80",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/c34f2aac8dcd1ae2886fa84256f607bc003f9d80"
}
],
"source": {
"advisory": "GHSA-9vg5-mp49-xghh",
"discovery": "UNKNOWN"
},
"title": "Discourse: Vulnerability in discourse-subscriptions plugin allowing users to self-grant to higher tier subscriptions"
}
},
"cveMetadata": {
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"state": "PUBLISHED"
},
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"dataVersion": "5.2"
}
CVE-2026-32951 (GCVE-0-2026-32951)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:41 – Updated: 2026-04-01 18:33
VLAI?
Title
Discourse: Authorization bypass in oneboxer via user-controlled category id
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authenticated user can obtain shared draft topic titles by sending an inline onebox request with a category_id parameter matching the shared drafts category. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
4.3 (Medium)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-32951",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-01T18:33:36.140649Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
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"vendor": "discourse",
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{
"status": "affected",
"version": "\u003e= 2026.1.0-latest, \u003c 2026.1.3"
},
{
"status": "affected",
"version": "\u003e= 2026.2.0-latest, \u003c 2026.2.2"
},
{
"status": "affected",
"version": "\u003e= 2026.3.0-latest, \u003c 2026.3.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authenticated user can obtain shared draft topic titles by sending an inline onebox request with a category_id parameter matching the shared drafts category. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"version": "3.1"
}
}
],
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{
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"description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
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"type": "CWE"
}
]
}
],
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
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{
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"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/discourse/discourse/security/advisories/GHSA-v93g-8f4f-4rgm"
},
{
"name": "https://github.com/discourse/discourse/commit/0b4e6ff170362823d1cfe2a1a096785d0d77ee83",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/0b4e6ff170362823d1cfe2a1a096785d0d77ee83"
}
],
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"discovery": "UNKNOWN"
},
"title": "Discourse: Authorization bypass in oneboxer via user-controlled category id"
}
},
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},
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}
CVE-2026-32620 (GCVE-0-2026-32620)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:41 – Updated: 2026-04-01 13:48
VLAI?
Title
Discourse: Missing post-level authorization allows whisper metadata disclosure
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, non-staff users could access read receipt information for staff-only posts they weren't supposed to see. No post content was exposed, only metadata about who read the post and when. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-32620",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-01T13:48:15.303289Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
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"dateUpdated": "2026-04-01T13:48:23.128Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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},
"title": "CISA ADP Vulnrichment"
}
],
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{
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"vendor": "discourse",
"versions": [
{
"status": "affected",
"version": "\u003e= 2026.1.0-latest, \u003c 2026.1.3"
},
{
"status": "affected",
"version": "\u003e= 2026.2.0-latest, \u003c 2026.2.2"
},
{
"status": "affected",
"version": "\u003e= 2026.3.0-latest, \u003c 2026.3.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, non-staff users could access read receipt information for staff-only posts they weren\u0027t supposed to see. No post content was exposed, only metadata about who read the post and when. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "LOW",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE"
}
}
],
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{
"descriptions": [
{
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"lang": "en",
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}
]
}
],
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"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/discourse/discourse/security/advisories/GHSA-xgg2-vwr6-2c65",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/discourse/discourse/security/advisories/GHSA-xgg2-vwr6-2c65"
},
{
"name": "https://github.com/discourse/discourse/commit/bf8dbf6155ae483245d42a0164181bc226af674d",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/bf8dbf6155ae483245d42a0164181bc226af674d"
}
],
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"advisory": "GHSA-xgg2-vwr6-2c65",
"discovery": "UNKNOWN"
},
"title": "Discourse: Missing post-level authorization allows whisper metadata disclosure"
}
},
"cveMetadata": {
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"assignerShortName": "GitHub_M",
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"dateReserved": "2026-03-12T15:29:36.557Z",
"dateUpdated": "2026-04-01T13:48:23.128Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-32619 (GCVE-0-2026-32619)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:40 – Updated: 2026-03-31 18:52
VLAI?
Title
Discourse: Insufficient topic visibility check allows unauthorized poll manipulation in private categories
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, users who lost access to a topic (e.g., removed from a private category group) could still interact with polls in that topic, including voting and toggling poll status. No content was exposed, but users could modify poll state in topics they should no longer have access to. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-285 - Improper Authorization
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-32619",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-31T18:50:11.611097Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-03-31T18:52:26.060Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
"product": "discourse",
"vendor": "discourse",
"versions": [
{
"status": "affected",
"version": "\u003e= 2026.1.0-latest, \u003c 2026.1.3"
},
{
"status": "affected",
"version": "\u003e= 2026.2.0-latest, \u003c 2026.2.2"
},
{
"status": "affected",
"version": "\u003e= 2026.3.0-latest, \u003c 2026.3.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, users who lost access to a topic (e.g., removed from a private category group) could still interact with polls in that topic, including voting and toggling poll status. No content was exposed, but users could modify poll state in topics they should no longer have access to. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0."
}
],
"metrics": [
{
"cvssV4_0": {
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-285",
"description": "CWE-285: Improper Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-31T17:40:41.588Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/discourse/discourse/security/advisories/GHSA-wq58-pvf6-w4p8",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/discourse/discourse/security/advisories/GHSA-wq58-pvf6-w4p8"
},
{
"name": "https://github.com/discourse/discourse/commit/d74ff25db994f06aa27e3466684f613b4e986ba6",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/d74ff25db994f06aa27e3466684f613b4e986ba6"
}
],
"source": {
"advisory": "GHSA-wq58-pvf6-w4p8",
"discovery": "UNKNOWN"
},
"title": "Discourse: Insufficient topic visibility check allows unauthorized poll manipulation in private categories"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-32619",
"datePublished": "2026-03-31T17:40:41.588Z",
"dateReserved": "2026-03-12T15:29:36.557Z",
"dateUpdated": "2026-03-31T18:52:26.060Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-32618 (GCVE-0-2026-32618)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:40 – Updated: 2026-04-03 16:20
VLAI?
Title
Discourse: Unauthorized channel membership inference via excluded_memberships_channel_id
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, there is possible channel membership inference from chat user search without authorization. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
4.3 (Medium)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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{
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"options": [
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},
{
"Automatable": "no"
},
{
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}
],
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"version": "2.0.3"
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},
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}
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},
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}
]
}
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}
],
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"x_refsource_CONFIRM"
],
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},
{
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CVE-2026-32615 (GCVE-0-2026-32615)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:40 – Updated: 2026-04-01 18:06
VLAI?
Title
Discourse: Category group moderators can perform actions on topics in restricted categories without read access
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, category group moderators could perform privileged actions on topics inside private categories they did not have read access to. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-285 - Improper Authorization
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
{
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{
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},
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}
],
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"version": "2.0.3"
},
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}
],
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"x_refsource_CONFIRM"
],
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CVE-2026-32607 (GCVE-0-2026-32607)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:40 – Updated: 2026-04-01 13:48
VLAI?
Title
Discourse: Stored XSS via unescaped assignee name
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, when the hidden prioritize_full_name_in_ux site setting is enabled (defaults to false, requires console access to change), user and group display names are rendered without HTML escaping in several assignment-related UI paths. This allows users with assign permission to inject arbitrary HTML/JavaScript that executes in the browser of any user viewing an affected topic. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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},
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}
],
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},
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CVE-2026-32273 (GCVE-0-2026-32273)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:39 – Updated: 2026-03-31 18:52
VLAI?
Title
Discourse: XSS on category description update via API
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, updating a category description via API is not sanitizing the description string, which can lead to XSS attacks. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
5.4 (Medium)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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},
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}
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CVE-2026-32243 (GCVE-0-2026-32243)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:39 – Updated: 2026-04-03 16:18
VLAI?
Title
Discourse: Stored XSS in discourse-ai shared conversations onebox
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an attacker with the ability to create shared AI conversations could inject arbitrary HTML and JavaScript via crafted conversation titles. This payload would execute in the browser of any user viewing the onebox preview, potentially allowing session hijacking or unauthorized actions on behalf of the victim. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
{
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"confidentialityImpact": "LOW",
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"scope": "CHANGED",
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},
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}
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"vendor": "discourse",
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{
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},
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],
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}
],
"metrics": [
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],
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},
"references": [
{
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"x_refsource_CONFIRM"
],
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},
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"title": "Discourse: Stored XSS in discourse-ai shared conversations onebox"
}
},
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},
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CVE-2026-32143 (GCVE-0-2026-32143)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:39 – Updated: 2026-04-01 18:05
VLAI?
Title
Discourse: Admin-only report can be exported by moderators
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, moderators could export CSV data for admin-restricted reports, bypassing the report visibility restrictions. This could expose sensitive operational data intended only for admins. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
{
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},
{
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}
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}
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}
],
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"x_refsource_CONFIRM"
],
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},
{
"name": "https://github.com/discourse/discourse/commit/727029a2983a14b50bce19439fbf9840db8372aa",
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"x_refsource_MISC"
],
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}
CVE-2026-32113 (GCVE-0-2026-32113)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:39 – Updated: 2026-04-01 13:56
VLAI?
Title
Discourse: Open redirect via `sso_destination_url` cookie in `enter`
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, the enter action in StaticController reads the sso_destination_url cookie and redirects to it with allow_other_host: true without validating the destination URL. While this cookie is normally set during legitimate DiscourseConnect Provider flows with cryptographically validated SSO payloads, cookies are client-controlled and can be set by attackers. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')
Assigner
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
{
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{
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},
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}
],
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"timestamp": "2026-04-01T13:56:09.785795Z",
"version": "2.0.3"
},
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}
}
],
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],
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}
],
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}
],
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"product": "discourse",
"vendor": "discourse",
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{
"status": "affected",
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},
{
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},
{
"status": "affected",
"version": "\u003e= 2026.3.0-latest, \u003c 2026.3.0"
}
]
}
],
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}
],
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],
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},
{
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],
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],
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}
],
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"discovery": "UNKNOWN"
},
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},
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CVE-2026-33073 (GCVE-0-2026-33073)
Vulnerability from cvelistv5 – Published: 2026-03-31 17:38 – Updated: 2026-04-03 16:16
VLAI?
Title
discourse-subscriptions plugin leaking stripe API key in multisite environment
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, the discourse-subscriptions plugin leaks stripe API keys across sites in a multisite cluster resulting in the potential for stripe related information to be leaked across sites within the same multisite cluster. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Severity ?
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
{
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"adp": [
{
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"confidentialityImpact": "LOW",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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}
},
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}
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},
"type": "ssvc"
}
}
],
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"shortName": "CISA-ADP"
},
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}
],
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{
"product": "discourse",
"vendor": "discourse",
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{
"status": "affected",
"version": "\u003e= 2026.1.0-latest, \u003c 2026.1.3"
},
{
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},
{
"status": "affected",
"version": "\u003e= 2026.3.0-latest, \u003c 2026.3.0"
}
]
}
],
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}
],
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},
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}
},
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},
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CVE-2026-33428 (GCVE-0-2026-33428)
Vulnerability from cvelistv5 – Published: 2026-03-20 23:21 – Updated: 2026-03-25 13:42
VLAI?
Title
Discourse Allows Unauthorized Access to Deleted Posts Index via Group Membership
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, a non-staff user with elevated group membership could access deleted posts belonging to any user due to an overly broad authorization check on the deleted posts index endpoint. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Severity ?
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
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{
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{
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-25T13:42:46.677298Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
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"dateUpdated": "2026-03-25T13:42:54.320Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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},
"title": "CISA ADP Vulnrichment"
}
],
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"vendor": "discourse",
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{
"status": "affected",
"version": "= 2026.3.0-latest"
},
{
"status": "affected",
"version": "\u003e= 2026.2.0-latest, \u003c 2026.2.1"
},
{
"status": "affected",
"version": "\u003e= 2026.1.0-latest, \u003c 2026.1.2"
}
]
}
],
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{
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}
],
"metrics": [
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}
}
],
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}
],
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],
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}
],
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"discovery": "UNKNOWN"
},
"title": "Discourse Allows Unauthorized Access to Deleted Posts Index via Group Membership"
}
},
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CVE-2026-33427 (GCVE-0-2026-33427)
Vulnerability from cvelistv5 – Published: 2026-03-20 23:20 – Updated: 2026-03-23 21:41
VLAI?
Title
Discourse Authorization Page Displays Unvalidated Redirect Domain
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an unauthenticated attacker can cause a legitimate Discourse authorization page to display an attacker-controlled domain, facilitating social engineering attacks against users. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Severity ?
CWE
- CWE-862 - Missing Authorization
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
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}
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CVE-2026-33426 (GCVE-0-2026-33426)
Vulnerability from cvelistv5 – Published: 2026-03-20 23:14 – Updated: 2026-03-24 15:30
VLAI?
Title
Discourse users can edit or synonymize hidden tags they can't see
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, users with tag-editing permissions could edit and create synonyms for tags hidden in restricted tag groups, even if they lacked visibility into those tags. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Severity ?
CWE
- CWE-862 - Missing Authorization
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
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},
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}
],
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],
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}
],
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},
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CVE-2026-33425 (GCVE-0-2026-33425)
Vulnerability from cvelistv5 – Published: 2026-03-20 23:12 – Updated: 2026-03-23 16:48
VLAI?
Title
Discourse has inferable private group membership or existence via exclude_groups parameter
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, unauthenticated users can determine whether a specific user is a member of a private group by observing changes in directory results when using the `exclude_groups` parameter. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, disable public access to the user directory via Admin → Settings → hide user profiles from public.
Severity ?
CWE
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
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},
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}
],
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},
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"description": "CWE-639: Authorization Bypass Through User-Controlled Key",
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},
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},
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CVE-2026-33424 (GCVE-0-2026-33424)
Vulnerability from cvelistv5 – Published: 2026-03-20 23:08 – Updated: 2026-03-25 13:43
VLAI?
Title
PM access granted through invites after access revocation
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an attacker can grant access to a private message topic through invites even after they lose access to that PM. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Severity ?
5.9 (Medium)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
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},
{
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-03-25T13:43:10.491986Z",
"version": "2.0.3"
},
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}
}
],
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},
{
"status": "affected",
"version": "= 2026.3.0-latest"
}
]
}
],
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}
],
"metrics": [
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"attackComplexity": "HIGH",
"attackVector": "ADJACENT_NETWORK",
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"baseScore": 5.9,
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}
],
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}
]
}
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},
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],
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}
],
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},
"title": "PM access granted through invites after access revocation"
}
},
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CVE-2026-33423 (GCVE-0-2026-33423)
Vulnerability from cvelistv5 – Published: 2026-03-20 23:06 – Updated: 2026-03-23 21:41
VLAI?
Title
Discourse staff can modify any user's group notification level
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, staff can modify any user's group notification level. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Severity ?
CWE
- CWE-862 - Missing Authorization
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
"containers": {
"adp": [
{
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{
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"id": "CVE-2026-33423",
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{
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},
{
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}
],
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"version": "2.0.3"
},
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}
}
],
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},
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}
],
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"vendor": "discourse",
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{
"status": "affected",
"version": "\u003e= 2026.1.0-latest, \u003c 2026.1.2"
},
{
"status": "affected",
"version": "\u003e= 2026.2.0-latest, \u003c 2026.2.1"
},
{
"status": "affected",
"version": "= 2026.3.0-latest"
}
]
}
],
"descriptions": [
{
"lang": "en",
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}
],
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"attackRequirements": "NONE",
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"baseScore": 1.3,
"baseSeverity": "LOW",
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"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
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"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW"
}
}
],
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"description": "CWE-862: Missing Authorization",
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"type": "CWE"
}
]
}
],
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},
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],
"url": "https://github.com/discourse/discourse/security/advisories/GHSA-qggq-wr6h-vhrg"
}
],
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"discovery": "UNKNOWN"
},
"title": "Discourse staff can modify any user\u0027s group notification level"
}
},
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CVE-2026-33422 (GCVE-0-2026-33422)
Vulnerability from cvelistv5 – Published: 2026-03-20 23:04 – Updated: 2026-03-24 02:10
VLAI?
Title
Discourse exposes ip_address of flagged user
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the `ip_address` of a flagged user is exposed to any user who can access the review queue, including users who should not be able to see IP addresses. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Severity ?
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
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CVE-2026-33411 (GCVE-0-2026-33411)
Vulnerability from cvelistv5 – Published: 2026-03-20 22:58 – Updated: 2026-03-24 18:03
VLAI?
Title
Discourse's solved topic stream has potential stored XSS in topic title
Summary
Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a potential stored XSS in topic titles for the solved posts stream. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, ensure that the Content Security Policy is enabled, and has not been modified in a way which would make it more vulnerable to XSS attacks.
Severity ?
5.4 (Medium)
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
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}
],
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],
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},
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CVE-2026-33291 (GCVE-0-2026-33291)
Vulnerability from cvelistv5 – Published: 2026-03-20 22:56 – Updated: 2026-03-24 02:08
VLAI?
Title
Discourse user can create Zendesk tickets even when it does not have access to topic
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, moderators can create Zendesk tickets for topics they do not have access to view. This affects all forums that use the Zendesk plugin. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Severity ?
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
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}
],
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},
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},
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"version": "= 2026.3.0-latest"
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]
}
],
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}
],
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}
],
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"discovery": "UNKNOWN"
},
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}
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CVE-2026-33251 (GCVE-0-2026-33251)
Vulnerability from cvelistv5 – Published: 2026-03-20 22:52 – Updated: 2026-03-24 18:05
VLAI?
Title
Discourse has a Hidden Solved topics permission bypass
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an authorization bypass vulnerability in hidden Solved topics may allow unauthorized users to accept or unaccept solutions. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, ensure only trusted users are part of the Site Setting for accept_all_solutions_allowed_groups.
Severity ?
5.4 (Medium)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
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],
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},
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},
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]
}
],
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}
],
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CVE-2026-32114 (GCVE-0-2026-32114)
Vulnerability from cvelistv5 – Published: 2026-03-20 03:13 – Updated: 2026-03-20 14:29
VLAI?
Title
Discourse's unscoped status lookups leak restricted metadata
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, there is an Insecure Direct Object Reference (IDOR) vulnerability that allows any authenticated user to access metadata about AI personas, features, and LLM models by providing their identifiers. This information includes credit allocations and usage statistics which are not intended to be public. The attack is performed over the network, requires low privileges (any logged-in user), and results in a low impact on confidentiality with no impact on integrity or availability. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. To work around this issue, disable AI plugin or upgrade to a patched version.
Severity ?
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
{
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],
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},
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}
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}
],
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},
{
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}
]
}
],
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}
],
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}
}
],
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],
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},
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}
},
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CVE-2026-31869 (GCVE-0-2026-31869)
Vulnerability from cvelistv5 – Published: 2026-03-20 03:10 – Updated: 2026-03-20 17:18
VLAI?
Title
Discourse: Composer mentions endpoint leaks hidden group membership through PM `allowed_names` check
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the ComposerController#mentions endpoint reveals hidden group membership to any authenticated user who can message the group. By supplying allowed_names referencing a hidden-membership group and probing arbitrary usernames, an attacker can infer membership based on whether user_reasons returns "private" for a given user. This bypasses group member-visibility controls. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. To work around this issue, restrict the messageable policy of any hidden-membership group to staff or group members only, so untrusted users cannot reach the vulnerable code path.
Severity ?
CWE
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
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CVE-2026-31805 (GCVE-0-2026-31805)
Vulnerability from cvelistv5 – Published: 2026-03-20 03:07 – Updated: 2026-03-20 15:46
VLAI?
Title
Discourse has a poll authorization bypass via post_id array parameter
Summary
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, an authorization bypass in the poll plugin allowed authenticated users to vote on, remove votes from, or toggle the open/closed status of polls they did not have access to. By passing post_id as an array (e.g. post_id[]=&post_id[]=), the authorization check resolves to the accessible post while the poll lookup resolves to a different post's poll. This affects the vote, remove_vote, and toggle_status endpoints in DiscoursePoll::PollsController. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch.
Severity ?
5.3 (Medium)
Assigner
References
| URL | Tags | |||||||
|---|---|---|---|---|---|---|---|---|
|
||||||||
Impacted products
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