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CVE PROGRAM SOURCE RECORD3.8 Low

CVE-2025-53971

Channel and Team Membership APIs inadvertently allow loss of Member privileges.

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles 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

  • 10.5.0 to ≤ 10.5.8affected
  • 9.11.0 to ≤ 9.11.17affected
  • 10.10.0unaffected
  • 10.5.9unaffected
  • 9.11.18unaffected

References