Headline
GHSA-x67c-v8jr-p29r: Mattermost Fails to Sanitize Path Traversal Sequences
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 fails to sanitize path traversal sequences in template file destination paths, which allows a system admin to perform path traversal attacks via malicious path components, potentially enabling malicious file placement outside intended directories.
- GitHub Advisory Database
- GitHub Reviewed
- CVE-2025-8023
Mattermost Fails to Sanitize Path Traversal Sequences
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
>= 10.8.0, <= 10.8.3
>= 10.5.0, <= 10.5.8
>= 9.11.0, <= 9.11.17
>= 10.9.0, <= 10.9.2
Patched versions
10.8.4
10.5.9
9.11.18
10.9.3
gomod github.com/mattermost/mattermost/server/v8 (Go)
< 8.0.0-20250708065844-b38e2eccda18
8.0.0-20250708065844-b38e2eccda18
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 fails to sanitize path traversal sequences in template file destination paths, which allows a system admin to perform path traversal attacks via malicious path components, potentially enabling malicious file placement outside intended directories.
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-8023
- https://mattermost.com/security-updates
Published to the GitHub Advisory Database
Aug 21, 2025
Last updated
Aug 21, 2025