CVSS 3.1
4.3 mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NCVE-2025-14350
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 8.0.0-20251209134645-761e56bb11cc.
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the channel_mentions property in the API response. Mattermost Advisory ID: MMSA-2025-00563
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 8% of CVEs (scores of 2026-10-31)
- CWE
- CWE-862
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-57cc-2pf4-mhmx | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20251209134645-761e56bb11cc | 8.0.0-20251209134645-761e56bb11cc |
| GHSA-57cc-2pf4-mhmx | Go | github.com/mattermost/mattermost-server | >=11.1.0 | no fix published |
| GHSA-57cc-2pf4-mhmx | Go | github.com/mattermost/mattermost-server | >=10.11.0 | no fix published |
| GHSA-57cc-2pf4-mhmx | Go | github.com/mattermost/mattermost-server | >=11.2.0 | no fix published |
| GHSA-57cc-2pf4-mhmx | Go | github.com/mattermost/mattermost-server | <5.3.2-0.20251209134645-761e56bb11cc | 5.3.2-0.20251209134645-761e56bb11cc |
| GO-2026-4521 | Go | github.com/mattermost/mattermost-server | all versions | no fix published |
| GO-2026-4521 | Go | github.com/mattermost/mattermost-server | >=10.11.0+incompatible | no fix published |
| GO-2026-4521 | Go | github.com/mattermost/mattermost-server | >=11.1.0+incompatible | no fix published |
| GO-2026-4521 | Go | github.com/mattermost/mattermost-server | >=11.2.0+incompatible | no fix published |
| GO-2026-4521 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2026-4521 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2026-4521 | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20251209134645-761e56bb11cc | 8.0.0-20251209134645-761e56bb11cc |