CVE-2025-11776GHSA-J6GG-R5JC-47CMGO-2025-4126
Guest user can discover archived public channels
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 11, 8.0.0-20250815165020-c8d66301415d, 5.3.2-0.20250815165020-c8d66301415d
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Mattermost Mattermost
fixed in 11
- github.com/mattermost/mattermost/server/v8Go
fixed in 8.0.0-20250815165020-c8d66301415d
- github.com/mattermost/mattermostGo
fixed in 5.3.2-0.20250815165020-c8d66301415d
- github.com/mattermost/mattermost-serverGo
fixed in 5.3.2-0.20250815165020-c8d66301415d
- github.com/mattermost/mattermost-server/v5Go
fixed in 5.3.2-0.20250815165020-c8d66301415d
- github.com/mattermost/mattermost-server/v6Go
fixed in 5.3.2-0.20250815165020-c8d66301415d
- github.com/mattermost/mattermostGo
All versions
- github.com/mattermost/mattermost/v5Go
All versions
- github.com/mattermost/mattermost-serverGo
All versions
- github.com/mattermost/mattermost-server/v5Go
All versions
- github.com/mattermost/mattermost-server/v6Go
All versions