| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/mattermost/mattermost-server | ≥ 10.10.0, < 10.10.1≥ 10.10.0+incompatible, < 10.10.1+incompatible≥ 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, < 10.9.3≥ 10.9.0+incompatible, < 10.9.3+incompatible≥ 9.11.0, < 9.11.18≥ 9.11.0+incompatible, < 9.11.18+incompatible | 10.10.110.10.1+incompatible10.5.910.5.9+incompatible10.8.410.8.4+incompatible10.9.310.9.3+incompatible9.11.189.11.18+incompatible |
| github.com/mattermost/mattermost-server/v5 | ≤ 5.39.3all versions | |
| github.com/mattermost/mattermost-server/v6 | ≤ 5.7.2all versions | |
| github.com/mattermost/mattermost/server/v8 | < 8.0.0-20250708173752-d6b35c41f0ae5all versions | 8.0.0-20250708173752-d6b35c41f0ae5 |
| mattermost server | = 10.10.0≥ 10.5.0, < 10.5.9≥ 10.8.0, < 10.8.4≥ 10.9.0, < 10.9.3≥ 9.11.0, < 9.11.18 | 10.5.910.8.410.9.39.11.18 |
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, 10.10.x <= 10.10.0 fail to validate upload types in remote cluster upload sessions which allows a system admin to upload non-attachment file types via shared channels that could potentially be placed in arbitrary filesystem directories.
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