VULNERABILITY INTELLIGENCE

CVE-2025-13821

CVSS score5.7 MEDIUM
EPSS probability0.24%
CISA KEVNot currently listed
Published2026-02-16
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Description

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

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-200
  • nvd@nist.gov: NVD-CWE-noinfo

Primary references