CVE-2025-13821CWE-200

User profile update exposes password hash and MFA secrets

Medium · published February 16, 2026

CVSS v3.1
5.7
EPSS
0%
Percentile
14.0
In the wild
Unconfirmed
What it is

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to sanitize sensitive data in WebSocket messages which allows authenticated users to exfiltrate password hashes and MFA secrets via profile nickname updates or email verification events. Mattermost Advisory ID: MMSA-2025-00560

The record
Technical detail
CVSS v3.1
5.7 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00238 · 14.0th percentile
Weakness
CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Published
2026-02-16T11:57Z
EPSS history
Timeline
  • 16 FEB 11:57Z
    User profile update exposes password hash and MFA secrets
    cvelistv5