CVSS 3.1
6.8 mediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:NCVE-2025-49222
Medium (6.8) in mattermost mattermost server. EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost-server 10.10.1, 10.10.1+incompatible, 10.5.9.
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.
Severity
- EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 22% of CVEs (scores of 2026-10-31)
- CWE
- CWE-434
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-q453-638c-h4mr | Go | github.com/mattermost/mattermost-server | >=10.8.0 <10.8.4 | 10.8.4 |
| GHSA-q453-638c-h4mr | Go | github.com/mattermost/mattermost-server | >=10.5.0 <10.5.9 | 10.5.9 |
| GHSA-q453-638c-h4mr | Go | github.com/mattermost/mattermost-server | >=9.11.0 <9.11.18 | 9.11.18 |
| GHSA-q453-638c-h4mr | Go | github.com/mattermost/mattermost-server | >=10.9.0 <10.9.3 | 10.9.3 |
| GHSA-q453-638c-h4mr | Go | github.com/mattermost/mattermost-server | >=10.10.0 <10.10.1 | 10.10.1 |
| GHSA-q453-638c-h4mr | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250708173752-d6b35c41f0ae5 | 8.0.0-20250708173752-d6b35c41f0ae5 |
| GHSA-q453-638c-h4mr | Go | github.com/mattermost/mattermost-server/v5 | <=5.39.3 | no fix published |
| GHSA-q453-638c-h4mr | Go | github.com/mattermost/mattermost-server/v6 | <=5.7.2 | no fix published |
| GO-2025-3904 | 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 >=10.10.0+incompatible <10.10.1+incompatible | 9.11.18+incompatible, 10.5.9+incompatible, 10.8.4+incompatible, 10.9.3+incompatible, 10.10.1+incompatible |
| GO-2025-3904 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2025-3904 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2025-3904 | Go | github.com/mattermost/mattermost/server/v8 | all versions | no fix published |