VULNERABILITY INTELLIGENCE

CVE-2025-55073

CVSS score5.4 MEDIUM
EPSS probability0.20%
CISA KEVNot currently listed
Published2025-11-14
Last modified2026-10-19
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Description

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to validate the relationship between the post being updated and the MSTeams plugin OAuth flow which allows an attacker to edit arbitrary posts via a crafted MSTeams plugin OAuth redirect URL.

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-306

Primary references