VULNERABILITY INTELLIGENCE

CVE-2025-49222

CVSS score6.8 MEDIUM
EPSS probability0.30%
CISA KEVNot currently listed
Published2025-08-21
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/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, 10.9.x <= 10.9.2, 10.10.x <= 10.10.0 fail to validate upload types in remote cluster upload sessions which allows a system admin to upload non-attachment file types via shared channels that could potentially be placed in arbitrary filesystem directories.

Weakness classification

  • responsibledisclosure@mattermost.com: CWE-434

Primary references