CVE-2025-11776
Mattermost versions <11 fail to properly restrict access to archived channel search API which allows guest users to discover archived public channels via the `/api/v4/teams/{team_id}/channels/search_archived` 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 10% of CVEs (scores of 2026-10-25)
- CWE
- CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Affected
- mattermost:mattermost_server
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-j6gg-r5jc-47cm | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250815165020-c8d66301415d | 8.0.0-20250815165020-c8d66301415d |
| GHSA-j6gg-r5jc-47cm | Go | github.com/mattermost/mattermost | <5.3.2-0.20250815165020-c8d66301415d | 5.3.2-0.20250815165020-c8d66301415d |
| GHSA-j6gg-r5jc-47cm | Go | github.com/mattermost/mattermost-server | <5.3.2-0.20250815165020-c8d66301415d | 5.3.2-0.20250815165020-c8d66301415d |
| GHSA-j6gg-r5jc-47cm | Go | github.com/mattermost/mattermost-server/v5 | <5.3.2-0.20250815165020-c8d66301415d | 5.3.2-0.20250815165020-c8d66301415d |
| GHSA-j6gg-r5jc-47cm | Go | github.com/mattermost/mattermost-server/v6 | <5.3.2-0.20250815165020-c8d66301415d | 5.3.2-0.20250815165020-c8d66301415d |
| GO-2025-4126 | Go | github.com/mattermost/mattermost | all versions | no fix published |
| GO-2025-4126 | Go | github.com/mattermost/mattermost/v5 | all versions | no fix published |
| GO-2025-4126 | Go | github.com/mattermost/mattermost-server | all versions | no fix published |
| GO-2025-4126 | Go | github.com/mattermost/mattermost-server/v5 | all versions | no fix published |
| GO-2025-4126 | Go | github.com/mattermost/mattermost-server/v6 | all versions | no fix published |
| GO-2025-4126 | Go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250815165020-c8d66301415d | 8.0.0-20250815165020-c8d66301415d |