A vulnerability marked as problematic has been reported in Mattermost up to 9.11.17/10.5.8. Impacted is an unknown function of the file /api/v4/teams/team-id/members/user-id/schemeRoles of the component API Endpoint. Performing manipulation results in incorrect authorization.
This vulnerability is cataloged as CVE-2025-53971. It is possible to initiate the attack remotely. There is no exploit available.
It is suggested to upgrade the affected component.
