CVE-2025-53971 (GCVE-0-2025-53971)

Vulnerability from cvelistv5 – Published: 2025-08-21 07:31 – Updated: 2025-08-21 14:51
VLAI?
Title
Channel and Team Membership APIs inadvertently allow loss of Member privileges.
Summary
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.
Severity ?
3.8 (Low)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version
Mattermost Mattermost Affected: 10.5.0 , ≤ 10.5.8 (semver)
Affected: 9.11.0 , ≤ 9.11.17 (semver)
Unaffected: 10.10.0
Unaffected: 10.5.9
Unaffected: 9.11.18
Create a notification for this product.
Credits
hackit_bharat
Show details on NVD website
To clipboard 

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.