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.
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
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History
Thu, 21 Aug 2025 15:15:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Thu, 21 Aug 2025 12:45:00 +0000
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| First Time appeared |
Mattermost
Mattermost mattermost |
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| Vendors & Products |
Mattermost
Mattermost mattermost |
Thu, 21 Aug 2025 07:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Channel and Team Membership APIs inadvertently allow loss of Member privileges. | |
| Weaknesses | CWE-863 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Mattermost
Published: 2025-08-21T07:31:01.870Z
Updated: 2025-08-21T14:51:19.669Z
Reserved: 2025-07-22T07:46:53.204Z
Link: CVE-2025-53971
Updated: 2025-08-21T14:51:16.544Z
Status : Undergoing Analysis
Published: 2025-08-21T08:15:30.540
Modified: 2025-08-22T18:09:17.710
Link: CVE-2025-53971
No data.
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