Medium severity4.3NVD Advisory· Published Nov 14, 2025· Updated Jun 17, 2026
CVE-2025-11776
CVE-2025-11776
Description
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
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost/server/v8Go | < 8.0.0-20250815165020-c8d66301415d | 8.0.0-20250815165020-c8d66301415d |
github.com/mattermost/mattermostGo | < 5.3.2-0.20250815165020-c8d66301415d | 5.3.2-0.20250815165020-c8d66301415d |
github.com/mattermost/mattermost-serverGo | < 5.3.2-0.20250815165020-c8d66301415d | 5.3.2-0.20250815165020-c8d66301415d |
github.com/mattermost/mattermost-server/v5Go | < 5.3.2-0.20250815165020-c8d66301415d | 5.3.2-0.20250815165020-c8d66301415d |
github.com/mattermost/mattermost-server/v6Go | < 5.3.2-0.20250815165020-c8d66301415d | 5.3.2-0.20250815165020-c8d66301415d |
Affected products
8cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: <11.0.0
- (no CPE)range: <11
- ghsa-coords6 versionspkg:golang/github.com/mattermost/mattermostpkg:golang/github.com/mattermost/mattermost-serverpkg:golang/github.com/mattermost/mattermost-server/v5pkg:golang/github.com/mattermost/mattermost-server/v6pkg:golang/github.com/mattermost/mattermost/server/v8pkg:rpm/opensuse/govulncheck-vulndb&distro=openSUSE%20Leap%2016.0
< 5.3.2-0.20250815165020-c8d66301415d+ 5 more
- (no CPE)range: < 5.3.2-0.20250815165020-c8d66301415d
- (no CPE)range: < 5.3.2-0.20250815165020-c8d66301415d
- (no CPE)range: < 5.3.2-0.20250815165020-c8d66301415d
- (no CPE)range: < 5.3.2-0.20250815165020-c8d66301415d
- (no CPE)range: < 8.0.0-20250815165020-c8d66301415d
- (no CPE)range: < 0.0.20260723T184607-160000.1.1
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-j6gg-r5jc-47cmghsaADVISORY
- mattermost.com/security-updatesnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2025-11776ghsaADVISORY
- github.com/mattermost/mattermostghsaPACKAGE
- github.com/mattermost/mattermost/commit/c8d66301415d5b447df0e829bdbaa92e8a83ecf8ghsaWEB
News mentions
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