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x/vulndb: potential Go vuln in github.com/mattermost/mattermost-server/v6: GHSA-j6gg-r5jc-47cm #4126

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x/vulndb: potential Go vuln in github.com/mattermost/mattermost-server/v6: GHSA-j6gg-r5jc-47cm#4126
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opened on Nov 14, 2025

Advisory GHSA-j6gg-r5jc-47cm references a vulnerability in the following Go modules:

Module
github.com/mattermost/mattermost-server
github.com/mattermost/mattermost-server/v5
github.com/mattermost/mattermost-server/v6

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

References:

Cross references:

See doc/quickstart.md for instructions on how to triage this report.

id: GO-ID-PENDING
modules:
    - module: github.com/mattermost/mattermost-server
      non_go_versions:
        - fixed: 8.0.0-20250815165020-c8d66301415d
      vulnerable_at: 11.1.0+incompatible
    - module: github.com/mattermost/mattermost-server/v5
      non_go_versions:
        - fixed: 5.3.2-0.20250815165020-c8d66301415d
      vulnerable_at: 5.39.3
    - module: github.com/mattermost/mattermost-server/v6
      vulnerable_at: 6.7.2
summary: Mattermost fails to properly restrict access to archived channel search API in github.com/mattermost/mattermost-server
cves:
    - CVE-2025-11776
ghsas:
    - GHSA-j6gg-r5jc-47cm
references:
    - advisory: https://github.com/advisories/GHSA-j6gg-r5jc-47cm
    - advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-11776
    - fix: https://github.com/mattermost/mattermost/commit/c8d66301415d5b447df0e829bdbaa92e8a83ecf8
    - web: https://mattermost.com/security-updates
source:
    id: GHSA-j6gg-r5jc-47cm
    created: 2025-11-14T23:02:34.356832263Z
review_status: UNREVIEWED

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