Vulnerabilites related to markdown-it - markdown-it
CVE-2022-21670 (GCVE-0-2022-21670)
Vulnerability from cvelistv5
Published
2022-01-10 20:40
Modified
2025-04-22 18:33
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-400 - Uncontrolled Resource Consumption
Summary
markdown-it is a Markdown parser. Prior to version 1.3.2, special patterns with length greater than 50 thousand characterss could slow down the parser significantly. Users should upgrade to version 12.3.2 to receive a patch. There are no known workarounds aside from upgrading.
References
| ▼ | URL | Tags |
|---|---|---|
| https://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c | x_refsource_CONFIRM | |
| https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101 | x_refsource_MISC |
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| markdown-it | markdown-it |
Version: < 12.3.2 |
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-03T02:46:39.537Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "https://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2022-21670",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-04-22T15:42:27.797317Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-04-22T18:33:46.200Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "markdown-it",
"vendor": "markdown-it",
"versions": [
{
"status": "affected",
"version": "\u003c 12.3.2"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "markdown-it is a Markdown parser. Prior to version 1.3.2, special patterns with length greater than 50 thousand characterss could slow down the parser significantly. Users should upgrade to version 12.3.2 to receive a patch. There are no known workarounds aside from upgrading."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2022-01-10T20:40:10.000Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101"
}
],
"source": {
"advisory": "GHSA-6vfc-qv3f-vr6c",
"discovery": "UNKNOWN"
},
"title": "Uncontrolled Resource Consumption in markdown-it",
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "security-advisories@github.com",
"ID": "CVE-2022-21670",
"STATE": "PUBLIC",
"TITLE": "Uncontrolled Resource Consumption in markdown-it"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "markdown-it",
"version": {
"version_data": [
{
"version_value": "\u003c 12.3.2"
}
]
}
}
]
},
"vendor_name": "markdown-it"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "markdown-it is a Markdown parser. Prior to version 1.3.2, special patterns with length greater than 50 thousand characterss could slow down the parser significantly. Users should upgrade to version 12.3.2 to receive a patch. There are no known workarounds aside from upgrading."
}
]
},
"impact": {
"cvss": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
}
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "CWE-400: Uncontrolled Resource Consumption"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "https://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c",
"refsource": "CONFIRM",
"url": "https://github.com/markdown-it/markdown-it/security/advisories/GHSA-6vfc-qv3f-vr6c"
},
{
"name": "https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101",
"refsource": "MISC",
"url": "https://github.com/markdown-it/markdown-it/commit/ffc49ab46b5b751cd2be0aabb146f2ef84986101"
}
]
},
"source": {
"advisory": "GHSA-6vfc-qv3f-vr6c",
"discovery": "UNKNOWN"
}
}
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2022-21670",
"datePublished": "2022-01-10T20:40:10.000Z",
"dateReserved": "2021-11-16T00:00:00.000Z",
"dateUpdated": "2025-04-22T18:33:46.200Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
CVE-2025-7969 (GCVE-0-2025-7969)
Vulnerability from cvelistv5
Published
2025-08-21 16:40
Modified
2025-09-01 17:19
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-79 - Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
Summary
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in markdown-it allows Cross-Site Scripting (XSS). This vulnerability is associated with program files lib/renderer.mjs.
This issue affects markdown-it: 14.1.0. NOTE: the Supplier does not consider this issue to be a vulnerability.
References
| ▼ | URL | Tags |
|---|---|---|
| https://fluidattacks.com/advisories/fito | third-party-advisory | |
| https://github.com/markdown-it/markdown-it | product |
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| markdown-it | markdown-it |
Version: 14.1.0 < |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-7969",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-08-21T17:22:06.168622Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-08-21T17:31:23.103Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://fluidattacks.com/advisories/fito"
}
],
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-08-25T04:45:43.251Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://github.com/markdown-it/markdown-it/issues/1122"
}
],
"title": "CVE Program Container",
"x_generator": {
"engine": "ADPogram 0.0.1"
}
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "markdown-it",
"programFiles": [
"lib/renderer.mjs"
],
"vendor": "markdown-it",
"versions": [
{
"status": "affected",
"version": "14.1.0",
"versionType": "custom"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:markdown-it:markdown-it:14.1.0:*:*:*:*:*:*:*",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "OR"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027) vulnerability in markdown-it allows Cross-Site Scripting (XSS).\u003cp\u003e This vulnerability is associated with program files \u003ctt\u003elib/renderer.mjs\u003c/tt\u003e.\u003c/p\u003e\u003cp\u003eThis issue affects markdown-it: 14.1.0. NOTE: the Supplier does not consider this issue to be a vulnerability.\u003c/p\u003e"
}
],
"value": "Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027) vulnerability in markdown-it allows Cross-Site Scripting (XSS). This vulnerability is associated with program files lib/renderer.mjs.\n\nThis issue affects markdown-it: 14.1.0. NOTE: the Supplier does not consider this issue to be a vulnerability."
}
],
"impacts": [
{
"capecId": "CAPEC-63",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-63 Cross-Site Scripting (XSS)"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-79",
"description": "CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or \u0027Cross-site Scripting\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-01T17:19:53.496Z",
"orgId": "84fe0718-d6bb-4716-a7e8-81a6d1daa869",
"shortName": "Fluid Attacks"
},
"references": [
{
"tags": [
"third-party-advisory"
],
"url": "https://fluidattacks.com/advisories/fito"
},
{
"tags": [
"product"
],
"url": "https://github.com/markdown-it/markdown-it"
}
],
"source": {
"discovery": "UNKNOWN"
},
"tags": [
"disputed"
],
"title": "Markdown-it 14.1.0 - Cross-site scripting (XSS)",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "84fe0718-d6bb-4716-a7e8-81a6d1daa869",
"assignerShortName": "Fluid Attacks",
"cveId": "CVE-2025-7969",
"datePublished": "2025-08-21T16:40:05.915Z",
"dateReserved": "2025-07-21T18:41:55.203Z",
"dateUpdated": "2025-09-01T17:19:53.496Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}