Headline
GHSA-gq3r-5833-5532: Mattermost Fails to Validate File Paths
Mattermost versions 10.9.x <= 10.9.1, 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate file paths during plugin import operations which allows restricted admin users to install unauthorized custom plugins via path traversal in the import functionality, bypassing plugin signature enforcement and marketplace restrictions.
- GitHub Advisory Database
- GitHub Reviewed
- CVE-2025-36530
Mattermost Fails to Validate File Paths
Moderate severity GitHub Reviewed Published Aug 21, 2025 to the GitHub Advisory Database • Updated Aug 21, 2025
Package
gomod github.com/mattermost/mattermost-server (Go)
Affected versions
>= 10.9.0, <= 10.9.1
>= 10.8.0, <= 10.8.3
>= 10.5.0, <= 10.5.8
>= 9.11.0, <= 9.11.17
Patched versions
10.9.2
10.8.4
10.5.9
9.11.18
gomod github.com/mattermost/mattermost/server/v8 (Go)
< 8.0.0-20250619095651-9dd0b3943e55
8.0.0-20250619095651-9dd0b3943e55
Mattermost versions 10.9.x <= 10.9.1, 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate file paths during plugin import operations which allows restricted admin users to install unauthorized custom plugins via path traversal in the import functionality, bypassing plugin signature enforcement and marketplace restrictions.
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-36530
- https://mattermost.com/security-updates
Published to the GitHub Advisory Database
Aug 21, 2025
Last updated
Aug 21, 2025