CVE-2025-27538 – Mattermost MFA Enforcement Bypass Vulnerability

The following table lists the changes that have been made to the
CVE-2025-27538 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Apr. 16, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N
    Added CWE CWE-306
    Added Reference https://mattermost.com/security-updates
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