How CVE-2025-25068 Works
Mattermost fails to enforce Multi-Factor Authentication (MFA) on plugin endpoints in affected versions. Authenticated attackers can bypass MFA by sending crafted API requests to plugin-specific routes. The vulnerability occurs because the MFA verification check is not applied to plugin API endpoints, allowing attackers to execute privileged actions without providing the second authentication factor. This flaw impacts versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8, and 10.5.x <= 10.5.0.
DailyCVE Form:
Platform: Mattermost
Version: <=10.4.2, <=10.3.3
Vulnerability: MFA Bypass
Severity: Critical
Date: 03/27/2025
What Undercode Say:
Exploitation:
1. Identify Plugin Endpoints:
curl -k -X GET "https://<target>/api/v4/plugins" -H "Authorization: Bearer <token>"
2. Bypass MFA via Plugin API:
curl -k -X POST "https://<target>/plugins/<plugin_id>/execute" -H "Authorization: Bearer <token>"
Mitigation:
1. Update Mattermost:
sudo apt update && sudo apt upgrade mattermost
2. Enforce MFA Globally:
UPDATE Configurations SET Value = 'true' WHERE Key = 'EnforceMFA';
3. Restrict Plugin APIs:
location ~ ^/plugins/ { auth_request /validate_mfa; }
Detection:
1. Audit Logs for MFA Bypass Attempts:
grep "plugin_api" /var/log/mattermost/security.log | grep "MFA_FAILURE"
2. Check Unpatched Versions:
dpkg -l | grep "mattermost" | egrep "10.4.2|10.3.3"
References:
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-25068
Extra Source Hub:
Undercode
