CVE-2025-27538

MFA Enforcement Bypass Allows Unauthorized Removal of MFA for Other Users

Published Apr 16, 2025 CVSS 3.1 · 2.2 Low EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Update Mattermost to versions 10.6.0, 10.5.2, 9.11.10 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-11361 Mattermost Missing Authentication for Critical Function
Github GHSA Github GHSA GHSA-j5jw-m2ph-3jjf Mattermost Missing Authentication for Critical Function
References
History
Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost
Mattermost mattermost Server
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values 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.
Title MFA Enforcement Bypass Allows Unauthorized Removal of MFA for Other Users
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 2.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Apr 16, 2025, 2:34 PM
Reserved
Apr 8, 2025, 7:50 AM
Status
Analyzed
Published
Apr 16, 2025, 8:15 AM
Modified
Jun 17, 2026, 9:03 AM