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x/vulndb: potential Go vuln in github.com/mattermost/mattermost/server/v8: GHSA-xpg8-8xpv-948p #4128

@GoVulnBot

Description

@GoVulnBot

Advisory GHSA-xpg8-8xpv-948p 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 < 11 fail to enforce multi-factor authentication on WebSocket connections which allows unauthenticated users to access sensitive information via WebSocket events.

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:
        - fixed: 11.1.0+incompatible
      vulnerable_at: 11.1.0-rc4+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
      versions:
        - fixed: 8.0.0-20250912063506-7d8b7b5e4a60
summary: Mattermost does not enforce MFA on WebSocket connections in github.com/mattermost/mattermost-server
cves:
    - CVE-2025-55070
ghsas:
    - GHSA-xpg8-8xpv-948p
references:
    - advisory: https://github.com/advisories/GHSA-xpg8-8xpv-948p
    - advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-55070
    - fix: https://github.com/mattermost/mattermost/commit/7d8b7b5e4a6076b2f7c87606883c417f9a610df5
    - web: https://mattermost.com/security-updates
notes:
    - fix: 'github.com/mattermost/mattermost/server/v8: could not add vulnerable_at: could not find tagged version between introduced and fixed'
source:
    id: GHSA-xpg8-8xpv-948p
    created: 2025-11-17T14:03:42.277236854Z
review_status: UNREVIEWED

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