Headline
GHSA-pj6f-rc94-gw53: Mattermost Fails to Sanitize File Names
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.
- GitHub Advisory Database
- GitHub Reviewed
- CVE-2025-6465
Mattermost Fails to Sanitize File Names
Moderate severity GitHub Reviewed Published Aug 21, 2025 to the GitHub Advisory Database • Updated Aug 22, 2025
Package
gomod github.com/mattermost/mattermost-server (Go)
Affected versions
>= 10.8.0, <= 10.8.3
>= 10.5.0, <= 10.5.8
>= 10.9.0, <= 10.9.3
= 10.10.0
Patched versions
10.8.4
10.5.9
10.9.4
10.10.1
gomod github.com/mattermost/mattermost/server/v8 (Go)
< 8.0.0-20250708173752-d6b35c41f0ae5
8.0.0-20250708173752-d6b35c41f0ae5
Published to the GitHub Advisory Database
Aug 21, 2025
Last updated
Aug 22, 2025