Vulnerability Database

323,358

Total vulnerabilities in the database

CVE-2025-13821

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

  • Published: Feb 16, 2026
  • Updated: Feb 17, 2026
  • CVE: CVE-2025-13821
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 5.7
  • AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

CWEs:

Software From Fixed in
mattermost / mattermost_server 10.11.0 10.11.10
mattermost / mattermost_server 11.1.0 11.1.3
mattermost / mattermost_server 11.2.0 11.2.2