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CVE-2025-11777 Cross-team channel membership access

🗓️ 13 Nov 2025 17:32:03Reported by MattermostType 
cvelist
 cvelist
🔗 www.cve.org👁 8 Views

Mattermost CVE-2025-11777 exposes cross-team user metadata and channel memberships via the Add Channel Member API.

Related
Affected
Refs
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "10.11.3",
        "status": "affected",
        "version": "10.11.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.5.11",
        "status": "affected",
        "version": "10.5.0",
        "versionType": "semver"
      },
      {
        "version": "11.0.0",
        "status": "unaffected"
      },
      {
        "version": "10.11.4",
        "status": "unaffected"
      },
      {
        "version": "10.5.12",
        "status": "unaffected"
      }
    ]
  }
]

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