CVE-2023-50333

Lack of restriction to manage group names for freshly demoted guests

Published Jan 2, 2024 CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Description
Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.

Remediation

Vendor Solution

Update Mattermost Server to versions 8.1.7, 9.3.0 or higher.

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
EUVD EUVD EUVD-2024-0319 Mattermost fails to update the permissions of the current session for a user who was just demoted to guest, allowing freshly demoted guests to change group names.
Github GHSA Github GHSA GHSA-9w97-9rqx-8v4j Mattermost allows demoted guests to change group names
References
History
Type Values Removed Values Added
Metrics ssvc

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Jun 17, 2025, 1:35 PM
Reserved
Dec 21, 2023, 8:00 AM
Status
Modified
Published
Jan 2, 2024, 10:15 AM
Modified
Jun 17, 2026, 6:39 AM