CVE-2025-11776
Medium · 4.3Mattermost fails to properly restrict access to archived channel search API
CVSS
4.3
EPSS
0.2%
Published
Nov 14, 2025
CISA due date
—
The record
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
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/mattermost/mattermost | 0 | 5.3.2-0.20250815165020-c8d66301415d |
| Go | github.com/mattermost/mattermost | 0 | No fix |
| Go | github.com/mattermost/mattermost-server | 0 | 5.3.2-0.20250815165020-c8d66301415d |
| Go | github.com/mattermost/mattermost-server | 0 | No fix |
| Go | github.com/mattermost/mattermost-server/v5 | 0 | 5.3.2-0.20250815165020-c8d66301415d |
| Go | github.com/mattermost/mattermost-server/v5 | 0 | No fix |
| Go | github.com/mattermost/mattermost-server/v6 | 0 | 5.3.2-0.20250815165020-c8d66301415d |
| Go | github.com/mattermost/mattermost-server/v6 | 0 | No fix |
| Go | github.com/mattermost/mattermost/server/v8 | 0 | 8.0.0-20250815165020-c8d66301415d |
| Go | github.com/mattermost/mattermost/v5 | 0 | No fix |
Related vulnerabilities
- GO-2025-4248 Mattermost has missing redirect URL validation in github.com/mattermost/mattermost Also affects github.com/mattermost/mattermost
- GO-2025-4256 Mattermost has an Invite Token Replay Vulnerability via Channel Membership Manipulation… Also affects github.com/mattermost/mattermost
- GO-2025-4247 Mattermost GitHub Plugin Bot Identity Validation Bypass Allows Arbitrary GitHub Reaction… Also affects github.com/mattermost/mattermost
- CVE-2025-13324 Mattermost has an Invite Token Replay Vulnerability via Channel Membership Manipulation Also affects github.com/mattermost/mattermost
- CVE-2025-13352 Mattermost GitHub Plugin Bot Identity Validation Bypass Allows Arbitrary GitHub Reaction… Also affects github.com/mattermost/mattermost
- CVE-2025-62690 Mattermost has missing redirect URL validation Also affects github.com/mattermost/mattermost
- GO-2025-4178 Mattermost fails to validate user permissions in Boards in… Also affects github.com/mattermost/mattermost
- GO-2025-4172 Mattermost fails to validate user permissions when deleting comments in Boards in… Also affects github.com/mattermost/mattermost