CVE-2025-27538 Information

Description

Mattermost versions 10.5.x <= 10.5.1 9.11.x <= 9.11.9 fail to enforce MFA checks in PUT /api/v4/users/user-id/mfa when the requesting user differs from the target user ID which allows users with edit_other_users permission to activate or deactivate MFA for other users even if those users have not set up MFA.

Reference

https://mattermost.com/security-updates