critical9.9
CVE-2025-4981
Mattermost allows authenticated users to write files to arbitrary locations
Impact
Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to sanitize filenames in the archive extractor which allows authenticated users to write files to arbitrary locations on the filesystem via uploading archives with path traversal sequences in filenames, potentially leading to remote code execution. The vulnerability impacts instances where file uploads and document search by content is enabled (FileSettings.EnableFileAttachments = true and FileSettings.ExtractContent = true). These configuration settings are enabled by default.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost-server | < 0.0.0-20250519205859-65aec10162f6 | 0.0.0-20250519205859-65aec10162f6 |
| go | github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250519205859-65aec10162f6 | 8.0.0-20250519205859-65aec10162f6 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 9.11.0 before 9.11.16 from 10.5.0 before 10.5.6 from 10.6.0 before 10.6.6 from 10.7.0 before 10.7.3 Version 10.8.0 |