CWE-863
Allowed-with-ReviewIncorrect Authorization
Abstraction: Class · Status: Incomplete
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
6552 vulnerabilities reference this CWE, most recent first.
GHSA-V25C-8349-V2Q3
Vulnerability from github – Published: 2022-06-15 00:00 – Updated: 2022-06-29 22:03thinkcmf v5.1.7 has an unauthorized vulnerability. The attacker can modify the password of the administrator account with id 1 through the background user management group permissions. The use condition is that the background user management group authority is required.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 5.1.7"
},
"package": {
"ecosystem": "Packagist",
"name": "thinkcmf/thinkcmf"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.0.0"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2021-40616"
],
"database_specific": {
"cwe_ids": [
"CWE-863"
],
"github_reviewed": true,
"github_reviewed_at": "2022-06-29T22:03:36Z",
"nvd_published_at": "2022-06-14T10:15:00Z",
"severity": "MODERATE"
},
"details": "thinkcmf v5.1.7 has an unauthorized vulnerability. The attacker can modify the password of the administrator account with id 1 through the background user management group permissions. The use condition is that the background user management group authority is required.",
"id": "GHSA-v25c-8349-v2q3",
"modified": "2022-06-29T22:03:36Z",
"published": "2022-06-15T00:00:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40616"
},
{
"type": "WEB",
"url": "https://github.com/thinkcmf/thinkcmf/issues/722"
},
{
"type": "PACKAGE",
"url": "https://github.com/thinkcmf/thinkcmf"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Incorrect Authorization in thinkcmf"
}
GHSA-V27J-88V5-QWRQ
Vulnerability from github – Published: 2026-04-07 15:30 – Updated: 2026-04-07 15:30An issue that allowed administrators to create and update users outside of their authorized organization scope has been resolved. This is an instance of CWE-863: Incorrect Authorization, and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N (5.8 Medium). This issue was fixed in version 4.0.260203.0 of the runZero Platform.
{
"affected": [],
"aliases": [
"CVE-2026-5378"
],
"database_specific": {
"cwe_ids": [
"CWE-863"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-04-07T15:17:47Z",
"severity": "MODERATE"
},
"details": "An issue that allowed administrators to create and update users outside of their authorized organization scope has been resolved. This is an instance of CWE-863: Incorrect Authorization, and has an estimated CVSS score of CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N (5.8 Medium). This issue was fixed in version 4.0.260203.0 of the runZero Platform.",
"id": "GHSA-v27j-88v5-qwrq",
"modified": "2026-04-07T15:30:52Z",
"published": "2026-04-07T15:30:52Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-5378"
},
{
"type": "WEB",
"url": "https://help.runzero.com/docs/release-notes/#402602030"
},
{
"type": "WEB",
"url": "https://www.runzero.com/advisories/runzero-platform-user-creation-leak-cve-2026-5378"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-V2H4-8467-FM2M
Vulnerability from github – Published: 2024-10-15 21:30 – Updated: 2024-10-15 21:30Vulnerability in the Oracle Sourcing product of Oracle E-Business Suite (component: Auctions). Supported versions that are affected are 12.2.3-12.2.13. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Sourcing. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Sourcing accessible data as well as unauthorized access to critical data or complete access to all Oracle Sourcing accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).
{
"affected": [],
"aliases": [
"CVE-2024-21279"
],
"database_specific": {
"cwe_ids": [
"CWE-863"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-10-15T20:15:20Z",
"severity": "HIGH"
},
"details": "Vulnerability in the Oracle Sourcing product of Oracle E-Business Suite (component: Auctions). Supported versions that are affected are 12.2.3-12.2.13. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Sourcing. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Sourcing accessible data as well as unauthorized access to critical data or complete access to all Oracle Sourcing accessible data. CVSS 3.1 Base Score 8.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N).",
"id": "GHSA-v2h4-8467-fm2m",
"modified": "2024-10-15T21:30:39Z",
"published": "2024-10-15T21:30:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-21279"
},
{
"type": "WEB",
"url": "https://www.oracle.com/security-alerts/cpuoct2024.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-V2M8-9547-V9WG
Vulnerability from github – Published: 2022-05-24 17:36 – Updated: 2022-05-24 17:36In updateIncomingFileConfirmNotification of BluetoothOppNotification.java, there is a possible permissions bypass. This could lead to local escalation of privilege allowing an attacker with physical possession of the device to transfer files to it over Bluetooth, with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-160691486
{
"affected": [],
"aliases": [
"CVE-2020-0473"
],
"database_specific": {
"cwe_ids": [
"CWE-863"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-12-15T16:15:00Z",
"severity": "MODERATE"
},
"details": "In updateIncomingFileConfirmNotification of BluetoothOppNotification.java, there is a possible permissions bypass. This could lead to local escalation of privilege allowing an attacker with physical possession of the device to transfer files to it over Bluetooth, with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11Android ID: A-160691486",
"id": "GHSA-v2m8-9547-v9wg",
"modified": "2022-05-24T17:36:24Z",
"published": "2022-05-24T17:36:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-0473"
},
{
"type": "WEB",
"url": "https://source.android.com/security/bulletin/pixel/2020-12-01"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-V2Q3-M84W-CP4M
Vulnerability from github – Published: 2026-09-09 15:35 – Updated: 2026-09-09 15:35snipe-it versions before 8.7.0 fail to validate the requestable flag for asset models in the POST /account/request/asset_model/{modelId} endpoint. Authenticated users can bypass administrative restrictions and create checkout requests for non-requestable asset models by submitting requests directly to the endpoint.
{
"affected": [],
"aliases": [
"CVE-2026-86753"
],
"database_specific": {
"cwe_ids": [
"CWE-863"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-09T14:17:24Z",
"severity": "MODERATE"
},
"details": "snipe-it versions before 8.7.0 fail to validate the requestable flag for asset models in the POST /account/request/asset_model/{modelId} endpoint. Authenticated users can bypass administrative restrictions and create checkout requests for non-requestable asset models by submitting requests directly to the endpoint.",
"id": "GHSA-v2q3-m84w-cp4m",
"modified": "2026-09-09T15:35:13Z",
"published": "2026-09-09T15:35:13Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/grokability/snipe-it/security/advisories/GHSA-xmcp-mrw5-cg3g"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86753"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/snipe-it-before-8.7.0-business-logic-bypass-via-asset-model-endpoint"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-V2V2-F783-358J
Vulnerability from github – Published: 2026-03-31 23:50 – Updated: 2026-04-06 17:34Summary
The Zalo image path fetched and stored inbound media before the DM/pairing authorization checks ran.
Impact
Unauthorized senders could force network fetches and disk writes in the inbound media store even when the message itself was rejected.
Affected Component
extensions/zalo/src/monitor.ts
Fixed Versions
- Affected:
<= 2026.3.24 - Patched:
>= 2026.3.28 - Latest stable
2026.3.28contains the fix.
Fix
Fixed by commit 68ceaf7a5f (zalo: gate image downloads before DM auth).
OpenClaw thanks @AntAISecurityLab for reporting.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 2026.3.24"
},
"package": {
"ecosystem": "npm",
"name": "openclaw"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2026.3.28"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-33576"
],
"database_specific": {
"cwe_ids": [
"CWE-862",
"CWE-863"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-31T23:50:44Z",
"nvd_published_at": "2026-03-31T15:16:14Z",
"severity": "MODERATE"
},
"details": "## Summary\n\nThe Zalo image path fetched and stored inbound media before the DM/pairing authorization checks ran.\n\n## Impact\n\nUnauthorized senders could force network fetches and disk writes in the inbound media store even when the message itself was rejected.\n\n## Affected Component\n\n`extensions/zalo/src/monitor.ts`\n\n## Fixed Versions\n\n- Affected: `\u003c= 2026.3.24`\n- Patched: `\u003e= 2026.3.28`\n- Latest stable `2026.3.28` contains the fix.\n\n## Fix\n\nFixed by commit `68ceaf7a5f` (`zalo: gate image downloads before DM auth`).\n\nOpenClaw thanks @AntAISecurityLab for reporting.",
"id": "GHSA-v2v2-f783-358j",
"modified": "2026-04-06T17:34:34Z",
"published": "2026-03-31T23:50:44Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-v2v2-f783-358j"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33576"
},
{
"type": "WEB",
"url": "https://github.com/openclaw/openclaw/commit/68ceaf7a5f64a23e78b95eff055e4b497218312a"
},
{
"type": "PACKAGE",
"url": "https://github.com/openclaw/openclaw"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/openclaw-unauthorized-media-download-via-zalo-channel"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "OpenClaw: Zalo channel downloads media before sender authorization"
}
GHSA-V2WW-5RH7-2H5V
Vulnerability from github – Published: 2026-06-18 20:33 – Updated: 2026-06-18 20:33Summary
OpenClaw's exec allowlist supported optional argPattern entries to restrict the arguments accepted for an allowlisted executable. In affected releases, Linux and macOS gateways skipped argPattern checks and treated a matching executable path as sufficient to satisfy the allowlist.
This meant an operator could configure an allowlist entry that appeared to permit only a narrow argv shape, but OpenClaw would allow other argv for the same executable without an approval prompt when tools.exec.security was set to allowlist.
This issue is limited to direct enforcement of configured argPattern values. OpenClaw's exec approvals remain best-effort guardrails and do not attempt to semantically model every interpreter, loader, package script, shell feature, or transitive file a command may use.
Affected configurations
This affects OpenClaw gateway deployments that meet all of these conditions:
- the gateway runs on Linux or macOS
- exec is configured with
tools.exec.security: "allowlist" - at least one exec allowlist entry uses
argPattern - the allowlisted executable accepts security-relevant arguments or flags
Path-only allowlist entries are not additionally affected by this issue, because those entries intentionally allow any arguments for the matched executable. Windows was not affected by this specific bug because the affected code path already applied argPattern checks on Windows.
Impact
If an untrusted or lower-trust sender can influence a tool-enabled agent to call exec, they may be able to run disallowed arguments for an executable that the operator intended to restrict with argPattern. Depending on the executable, those arguments can cause host-side file access, network access, or command execution that should have required an approval prompt.
The practical impact depends on the operator's allowlist and channel exposure. Examples of higher-risk allowlisted executables include tools with interpreter, loader, subprocess, network, or plugin flags such as git, python, node, bash, find, tar, and ssh.
This is not a bypass of all exec approval semantics. It is a bypass of the direct argPattern predicate that the operator configured and that the exec tool description advertised as enforced at runtime.
Patched Versions
The first stable patched version is 2026.5.12.
Mitigations
Upgrade to openclaw@2026.5.12 or later. Before upgrading, operators who use exec allowlist mode should review entries that combine an executable path with argPattern, especially for interpreter-like or subprocess-capable tools.
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "openclaw"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2026.5.12"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-53853"
],
"database_specific": {
"cwe_ids": [
"CWE-693",
"CWE-863"
],
"github_reviewed": true,
"github_reviewed_at": "2026-06-18T20:33:22Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "### Summary\n\nOpenClaw\u0027s exec allowlist supported optional `argPattern` entries to restrict the arguments accepted for an allowlisted executable. In affected releases, Linux and macOS gateways skipped `argPattern` checks and treated a matching executable path as sufficient to satisfy the allowlist.\n\nThis meant an operator could configure an allowlist entry that appeared to permit only a narrow argv shape, but OpenClaw would allow other argv for the same executable without an approval prompt when `tools.exec.security` was set to `allowlist`.\n\nThis issue is limited to direct enforcement of configured `argPattern` values. OpenClaw\u0027s exec approvals remain best-effort guardrails and do not attempt to semantically model every interpreter, loader, package script, shell feature, or transitive file a command may use.\n\n### Affected configurations\n\nThis affects OpenClaw gateway deployments that meet all of these conditions:\n\n- the gateway runs on Linux or macOS\n- exec is configured with `tools.exec.security: \"allowlist\"`\n- at least one exec allowlist entry uses `argPattern`\n- the allowlisted executable accepts security-relevant arguments or flags\n\nPath-only allowlist entries are not additionally affected by this issue, because those entries intentionally allow any arguments for the matched executable. Windows was not affected by this specific bug because the affected code path already applied `argPattern` checks on Windows.\n\n### Impact\n\nIf an untrusted or lower-trust sender can influence a tool-enabled agent to call exec, they may be able to run disallowed arguments for an executable that the operator intended to restrict with `argPattern`. Depending on the executable, those arguments can cause host-side file access, network access, or command execution that should have required an approval prompt.\n\nThe practical impact depends on the operator\u0027s allowlist and channel exposure. Examples of higher-risk allowlisted executables include tools with interpreter, loader, subprocess, network, or plugin flags such as `git`, `python`, `node`, `bash`, `find`, `tar`, and `ssh`.\n\nThis is not a bypass of all exec approval semantics. It is a bypass of the direct `argPattern` predicate that the operator configured and that the exec tool description advertised as enforced at runtime.\n\n### Patched Versions\n\nThe first stable patched version is `2026.5.12`.\n\n### Mitigations\n\nUpgrade to `openclaw@2026.5.12` or later. Before upgrading, operators who use exec allowlist mode should review entries that combine an executable path with `argPattern`, especially for interpreter-like or subprocess-capable tools.",
"id": "GHSA-v2ww-5rh7-2h5v",
"modified": "2026-06-18T20:33:22Z",
"published": "2026-06-18T20:33:22Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/openclaw/openclaw/security/advisories/GHSA-v2ww-5rh7-2h5v"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53853"
},
{
"type": "PACKAGE",
"url": "https://github.com/openclaw/openclaw"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/openclaw-argument-pattern-bypass-in-exec-allowlist-via-linux-and-macos"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L",
"type": "CVSS_V3"
}
],
"summary": "OpenClaw: Linux and macOS exec allowlists skipped configured argument patterns"
}
GHSA-V326-937J-3P86
Vulnerability from github – Published: 2023-07-17 18:31 – Updated: 2024-04-04 06:11Mattermost WelcomeBot plugin fails to to validate the membership status when inviting or adding users to channels allowing guest accounts to be added or invited to channels by default.
{
"affected": [],
"aliases": [
"CVE-2023-3613"
],
"database_specific": {
"cwe_ids": [
"CWE-863"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2023-07-17T16:15:11Z",
"severity": "LOW"
},
"details": "Mattermost WelcomeBot plugin fails to to validate the membership status when inviting or adding users to channels allowing\u00a0guest accounts to be added or invited to channels by default. \n\n",
"id": "GHSA-v326-937j-3p86",
"modified": "2024-04-04T06:11:04Z",
"published": "2023-07-17T18:31:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-3613"
},
{
"type": "WEB",
"url": "https://mattermost.com/security-updates"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
}
]
}
GHSA-V32J-VGQH-F22G
Vulnerability from github – Published: 2026-08-24 18:31 – Updated: 2026-08-24 18:31BookStack before 26.05.4 contains a broken access control vulnerability that allows authenticated API users with image-update or image-delete permissions to manipulate other users' avatars by exploiting missing content-type restrictions in the Image Gallery API endpoints. Attackers can supply a user avatar's ID to the API controller, which loads any image type without the web controller's gallery and drawio restrictions, and when the avatar's uploaded_to field matches a page ID accessible to the attacker, the authorization check passes allowing the attacker to rename, replace, or delete the target user's avatar without requiring user-management permission.
{
"affected": [],
"aliases": [
"CVE-2026-67204"
],
"database_specific": {
"cwe_ids": [
"CWE-863"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-24T16:17:17Z",
"severity": "MODERATE"
},
"details": "BookStack before 26.05.4 contains a broken access control vulnerability that allows authenticated API users with image-update or image-delete permissions to manipulate other users\u0027 avatars by exploiting missing content-type restrictions in the Image Gallery API endpoints. Attackers can supply a user avatar\u0027s ID to the API controller, which loads any image type without the web controller\u0027s gallery and drawio restrictions, and when the avatar\u0027s uploaded_to field matches a page ID accessible to the attacker, the authorization check passes allowing the attacker to rename, replace, or delete the target user\u0027s avatar without requiring user-management permission.",
"id": "GHSA-v32j-vgqh-f22g",
"modified": "2026-08-24T18:31:51Z",
"published": "2026-08-24T18:31:51Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-67204"
},
{
"type": "WEB",
"url": "https://codeberg.org/bookstack/bookstack/releases/tag/v26.05.4"
},
{
"type": "WEB",
"url": "https://github.com/BookStackApp/BookStack/releases/tag/v26.05.4"
},
{
"type": "WEB",
"url": "https://www.bookstackapp.com/blog/bookstack-release-v26-05-4"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/bookstack-broken-access-control-via-image-gallery-api"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-V37P-G38W-W7WG
Vulnerability from github – Published: 2026-08-17 15:30 – Updated: 2026-08-17 15:30Mattermost versions 11.8.x <= 11.8.2, 11.7.x <= 11.7.6, 10.11.x <= 10.11.21 fail to restrict channel member role assignment to channel-scoped roles which allows a channel administrator to gain additional channel permissions via the channel member roles API.. Mattermost Advisory ID: MMSA-2026-00697
{
"affected": [],
"aliases": [
"CVE-2026-16048"
],
"database_specific": {
"cwe_ids": [
"CWE-863"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-08-17T15:16:54Z",
"severity": "MODERATE"
},
"details": "Mattermost versions 11.8.x \u003c= 11.8.2, 11.7.x \u003c= 11.7.6, 10.11.x \u003c= 10.11.21 fail to restrict channel member role assignment to channel-scoped roles which allows a channel administrator to gain additional channel permissions via the channel member roles API.. Mattermost Advisory ID: MMSA-2026-00697",
"id": "GHSA-v37p-g38w-w7wg",
"modified": "2026-08-17T15:30:40Z",
"published": "2026-08-17T15:30:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16048"
},
{
"type": "WEB",
"url": "https://mattermost.com/security-updates"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
"type": "CVSS_V3"
}
]
}
Mitigation
- Divide the product into anonymous, normal, privileged, and administrative areas. Reduce the attack surface by carefully mapping roles with data and functionality. Use role-based access control (RBAC) [REF-229] to enforce the roles at the appropriate boundaries.
- Note that this approach may not protect against horizontal authorization, i.e., it will not protect a user from attacking others with the same role.
Mitigation
Ensure that access control checks are performed related to the business logic. These checks may be different than the access control checks that are applied to more generic resources such as files, connections, processes, memory, and database records. For example, a database may restrict access for medical records to a specific database user, but each record might only be intended to be accessible to the patient and the patient's doctor [REF-7].
Mitigation MIT-4.4
Strategy: Libraries or Frameworks
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, consider using authorization frameworks such as the JAAS Authorization Framework [REF-233] and the OWASP ESAPI Access Control feature [REF-45].
Mitigation
- For web applications, make sure that the access control mechanism is enforced correctly at the server side on every page. Users should not be able to access any unauthorized functionality or information by simply requesting direct access to that page.
- One way to do this is to ensure that all pages containing sensitive information are not cached, and that all such pages restrict access to requests that are accompanied by an active and authenticated session token associated with a user who has the required permissions to access that page.
Mitigation
Use the access control capabilities of your operating system and server environment and define your access control lists accordingly. Use a "default deny" policy when defining these ACLs.
No CAPEC attack patterns related to this CWE.