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CVE-2025-10545

🗓️ 16 Oct 2025 08:24:25Reported by MattermostType 
cve
 cve
🔗 web.nvd.nist.gov📰️ 1 Media mentions👁 7 Views🌐 WEB

Guest users can add private channel members due to improper validation in channel membership on Mattermost 10.5.x and 10.11.x.

Related
Detection
Affected
Refs
Paths
Social
NVD
Node
mattermostmattermost_serverRange10.5.010.5.11
OR
mattermostmattermost_serverRange10.11.010.11.3
[
  {
    "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"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
channel_idrequest body/api/v4/channels/{channel_id}/membersGuest users can add any team members to private channels due to improper validation of guest permissions.CWE-863
user_idrequest body/api/v4/channels/{channel_id}/membersGuest users can add any team members to private channels due to improper validation of guest permissions.CWE-863

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21 Oct 2025 18:02Current
6.4Medium risk
Vulners AI Score6.4
CVSS 3.13.1 - 4.3
EPSS0.00009
SSVC
7