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x/vulndb: potential Go vuln in github.com/mattermost/mattermost/server/v8: GHSA-9hh7-6558-qfp2 #4133

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x/vulndb: potential Go vuln in github.com/mattermost/mattermost/server/v8: GHSA-9hh7-6558-qfp2#4133
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Description

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opened on Nov 18, 2025

Advisory GHSA-9hh7-6558-qfp2 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
github.com/mattermost/mattermost/server/v8

Description:
Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects.

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
      versions:
        - introduced: 10.5.0+incompatible
        - fixed: 10.5.12+incompatible
        - introduced: 10.11.0+incompatible
        - fixed: 10.11.4+incompatible
      vulnerable_at: 10.11.4-rc3+incompatible
    - module: github.com/mattermost/mattermost-server/v5
      vulnerable_at: 5.39.3
    - module: github.com/mattermost/mattermost-server/v6
      vulnerable_at: 6.7.2
    - module: github.com/mattermost/mattermost/server/v8
      non_go_versions:
        - fixed: 8.0.0-20250905150616-ba86dfc5876b6
      vulnerable_at: 8.0.0-20251118192645-285666303c57
summary: |-
    Mattermost allows other users to determine when users had read channels via
    channel member objects in github.com/mattermost/mattermost-server
cves:
    - CVE-2025-55074
ghsas:
    - GHSA-9hh7-6558-qfp2
references:
    - advisory: https://github.com/advisories/GHSA-9hh7-6558-qfp2
    - advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-55074
    - fix: https://github.com/mattermost/mattermost/commit/98acefe911dd9de7edf47a7d825dd99f53141a52
    - fix: https://github.com/mattermost/mattermost/commit/ba86dfc5876b354b9d3c20ff45c08ca6f8426149
    - fix: https://github.com/mattermost/mattermost/commit/d72d437f1567ba0b639b6e4fd73bab06c51baab5
    - fix: https://github.com/mattermost/mattermost/pull/33835
    - fix: https://github.com/mattermost/mattermost/pull/33905
    - web: https://mattermost.com/security-updates
source:
    id: GHSA-9hh7-6558-qfp2
    created: 2025-11-18T22:04:43.201503446Z
review_status: UNREVIEWED

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