GHSA-pj6f-rc94-gw53MediumCVSS 4.3

Mattermost Fails to Sanitize File Names

Published
August 21, 2025
Last Modified
August 29, 2025

🔗 CVE IDs covered (1)

CVE-2025-6465 →

📋 Description

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to sanitize file names which allows users with file upload permission to overwrite file attachment thumbnails via path traversal in file streaming APIs.

🎯 Affected products5

  • go/github.com/mattermost/mattermost-server:>= 10.8.0, <= 10.8.3
  • go/github.com/mattermost/mattermost-server:>= 10.5.0, <= 10.5.8
  • go/github.com/mattermost/mattermost-server:>= 10.9.0, <= 10.9.3
  • go/github.com/mattermost/mattermost-server:= 10.10.0
  • go/github.com/mattermost/mattermost/server/v8:< 8.0.0-20250708173752-d6b35c41f0ae5

🔗 References (4)