| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/mattermost/mattermost-server | ≥ 10.5.0, < 10.5.9≥ 10.5.0+incompatible, < 10.5.9+incompatible≥ 10.8.0, < 10.8.4≥ 10.8.0+incompatible, < 10.8.4+incompatible≥ 10.9.0, < 10.9.2≥ 10.9.0+incompatible, < 10.9.2+incompatible≥ 9.11.0, < 9.11.18≥ 9.11.0+incompatible, < 9.11.18+incompatible | 10.5.910.5.9+incompatible10.8.410.8.4+incompatible10.9.210.9.2+incompatible9.11.189.11.18+incompatible |
| github.com/mattermost/mattermost-server/v5 | ≤ 5.11.1all versions | |
| github.com/mattermost/mattermost-server/v6 | ≤ 6.7.2all versions | |
| github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250619095651-9dd0b3943e55all versions | 8.0.0-20250619095651-9dd0b3943e55 |
| mattermost server | ≥ 10.5.0, < 10.5.9≥ 10.8.0, < 10.8.4≥ 10.9.0, < 10.9.2≥ 9.11.0, < 9.11.18 | 10.5.910.8.410.9.29.11.18 |
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.
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