CVE-2025-13821 — User profile update exposes password hash and MFA secrets
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 p…
Published: 2026-02-16 · CVSS: 5.7 · CVSS 3.1
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
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7