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CVE-2025-10545 Guest user can add unauthorized team users to private channels

🗓️ 16 Oct 2025 08:24:25Reported by MattermostType 
cvelist
 cvelist
🔗 www.cve.org👁 4 Views

CVE-2025-10545 lets guest users add unauthorized team members to private channels via the API.

Related
Affected
Refs
[
  {
    "defaultStatus": "unaffected",
    "product": "Mattermost",
    "vendor": "Mattermost",
    "versions": [
      {
        "lessThanOrEqual": "10.5.10",
        "status": "affected",
        "version": "10.5.0",
        "versionType": "semver"
      },
      {
        "lessThanOrEqual": "10.11.2",
        "status": "affected",
        "version": "10.11.0",
        "versionType": "semver"
      },
      {
        "version": "10.12.0",
        "status": "unaffected"
      },
      {
        "version": "10.5.11",
        "status": "unaffected"
      },
      {
        "version": "10.11.3",
        "status": "unaffected"
      }
    ]
  }
]

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