CVE-2025-12559
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to sanitize team email addresses to be visible only to Team Admins, which allows any authenticated user to view team email addresses via the GET /api/v4/channels/{channel_id}/common_teams endpoint
- CVSS 3.1
- 4.3
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N - EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-25)
- CWE
- CWE-200
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-4g87-9x45-cx2h | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20251015091448-abbf01b9db45 | 8.0.0-20251015091448-abbf01b9db45 |
| GHSA-4g87-9x45-cx2h | Go | github.com/mattermost/mattermost-server | >=11.0.0 <11.0.3 | 11.0.3 |
| GHSA-4g87-9x45-cx2h | Go | github.com/mattermost/mattermost-server | >=10.12.0 <10.12.2 | 10.12.2 |
| GHSA-4g87-9x45-cx2h | Go | github.com/mattermost/mattermost-server | >=10.11.0 <10.11.5 | 10.11.5 |
| GHSA-4g87-9x45-cx2h | Go | github.com/mattermost/mattermost-server | >=10.5.0 <10.5.13 | 10.5.13 |
| GO-2025-4169 | Go | github.com/mattermost/mattermost-server | all versions | no fix published |
| GO-2025-4169 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2025-4169 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2025-4169 | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20251015091448-abbf01b9db45 | 8.0.0-20251015091448-abbf01b9db45 |