CVSS 3.1
4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NCVE-2025-27933
Medium (4.3) in mattermost mattermost server. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in github.com/mattermost/mattermost/server/v8 10.3.4, 10.4.3, 8.0.0-20250218135018-e644e3c8e393.
Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to fail to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-31)
- CWE
- CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-h5v9-xw2g-7hrq | Go | github.com/mattermost/mattermost/server/v8 | >=10.4.0 <10.4.3 | 10.4.3 |
| GHSA-h5v9-xw2g-7hrq | Go | github.com/mattermost/mattermost/server/v8 | >=10.3.0 <10.3.4 | 10.3.4 |
| GHSA-h5v9-xw2g-7hrq | Go | github.com/mattermost/mattermost/server/v8 | >=9.11.0 <9.11.9 | 9.11.9 |
| GHSA-h5v9-xw2g-7hrq | Go | github.com/mattermost/mattermost-server | <9.11.9 | 9.11.9 |
| GHSA-h5v9-xw2g-7hrq | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250218135018-e644e3c8e393 | 8.0.0-20250218135018-e644e3c8e393 |
| GO-2025-3556 | Go | github.com/mattermost/mattermost-server | >=9.11.0+incompatible <9.11.9+incompatible >=10.3.0+incompatible <10.3.4+incompatible >=10.4.0+incompatible <10.4.3+incompatible | 9.11.9+incompatible, 10.3.4+incompatible, 10.4.3+incompatible |
| GO-2025-3556 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2025-3556 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2025-3556 | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250218135018-e644e3c8e393 | 8.0.0-20250218135018-e644e3c8e393 |