VULNERABILITY INTELLIGENCE

CVE-2026-28741

CVSS score6.8 MEDIUM
EPSS probability0.13%
CISA KEVNot currently listed
Published2026-04-15
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Description

Mattermost versions 10.11.x <= 10.11.12, 11.5.x <= 11.5.0, 11.4.x <= 11.4.2, 11.3.x <= 11.3.2 fail to validate CSRF tokens on an authentication endpoint which allows an attacker to update a user's authentication method via a CSRF attack by tricking a user into visiting a malicious page. Mattermost Advisory ID: MMSA-2026-00625

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-352

Primary references