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CVE PROGRAM SOURCE RECORD3.1 Low

CVE-2025-10545

Guest user can add unauthorized team users to private channels

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the `/api/v4/channels/{channel_id}/members` 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

  • 10.5.0 to ≤ 10.5.10affected
  • 10.11.0 to ≤ 10.11.2affected
  • 10.12.0unaffected
  • 10.5.11unaffected
  • 10.11.3unaffected

References