VULNERABILITY INTELLIGENCE

CVE-2025-9078

CVSS score4.3 MEDIUM
EPSS probability0.15%
CISA KEVNot currently listed
Published2025-09-15
Last modified2026-10-19
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Description

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.1, 10.9.x <= 10.9.3 fail to properly validate cache keys for link metadata which allows authenticated users to access unauthorized posts and poison link previews via hash collision attacks on FNV-1 hashing

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-328

Primary references