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CVE PROGRAM SOURCE RECORD3.1 Low

CVE-2025-11777

Cross-team channel membership access

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to properly validate team membership permissions in the Add Channel Member API which allows users from one team to access user metadata and channel membership information from other teams via the API endpoint

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mattermost Mattermost

Default version status: unaffected

  • 10.11.0 to ≤ 10.11.3affected
  • 10.5.0 to ≤ 10.5.11affected
  • 11.0.0unaffected
  • 10.11.4unaffected
  • 10.5.12unaffected

References