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 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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mattermost | Mattermost | 10.8.0 – ≤ 10.8.3, 10.5.0 – ≤ 10.5.8, 9.11.0 – ≤ 9.11.17, 10.9.0 – ≤ 10.9.2 | 10.10.0 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/mattermost/mattermost-server | >= 10.8.0, < 10.8.4 | 10.8.4 | GHSA-x67c-v8jr-p29r |
| Go | github.com/mattermost/mattermost-server | >= 10.5.0, < 10.5.9 | 10.5.9 | GHSA-x67c-v8jr-p29r |
| Go | github.com/mattermost/mattermost-server | >= 9.11.0, < 9.11.18 | 9.11.18 | GHSA-x67c-v8jr-p29r |
| Go | github.com/mattermost/mattermost-server | >= 10.9.0, < 10.9.3 | 10.9.3 | GHSA-x67c-v8jr-p29r |
| Go | github.com/mattermost/mattermost-server | >= 9.11.0+incompatible, < 9.11.18+incompatible · >= 10.5.0+incompatible, < 10.5.9+incompatible · >= 10.8.0+incompatible, < 10.8.4+incompatible · >= 10.9.0+incompatible, < 10.9.3+incompatible | 9.11.18+incompatible, 10.5.9+incompatible, 10.8.4+incompatible, 10.9.3+incompatible | GO-2025-3907 |
| Go | github.com/mattermost/mattermost-server/v5 | <= 5.39.5 | — | GHSA-x67c-v8jr-p29r |
| Go | github.com/mattermost/mattermost-server/v5 | all versions | — | GO-2025-3907 |
| Go | github.com/mattermost/mattermost-server/v6 | <= 6.7.2 | — | GHSA-x67c-v8jr-p29r |
| Go | github.com/mattermost/mattermost-server/v6 | all versions | — | GO-2025-3907 |
| Go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250708065844-b38e2eccda18 | 8.0.0-20250708065844-b38e2eccda18 | GHSA-x67c-v8jr-p29r |
Advisories 1
- WID-SEC-2025-1625 Mattermost Server und Plugins: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 21, 2025