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
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-j6gg-r5jc-47cm Mattermost fails to properly restrict access to archived channel search API
Fixes

Solution

Update Mattermost to versions 11.0.0 or higher.


Workaround

No workaround given by the vendor.

References
History

Mon, 17 Nov 2025 18:00:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
Vendors & Products Mattermost mattermost Server

Sat, 15 Nov 2025 21:30:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost
Mattermost mattermost
Vendors & Products Mattermost
Mattermost mattermost

Fri, 14 Nov 2025 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 14 Nov 2025 08:15:00 +0000

Type Values Removed Values Added
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
Title Guest user can discover archived public channels
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published:

Updated: 2025-11-14T15:49:13.309Z

Reserved: 2025-10-15T11:35:59.209Z

Link: CVE-2025-11776

cve-icon Vulnrichment

Updated: 2025-11-14T15:49:08.960Z

cve-icon NVD

Status : Analyzed

Published: 2025-11-14T08:15:43.753

Modified: 2025-11-17T17:52:51.513

Link: CVE-2025-11776

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-11-15T21:25:34Z

Weaknesses