CVE-2023-4107: Mattermost

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Mattermost fails to properly validate the requesting user permissions when updating a system admin, allowing a user manager to update a system admin's details such as email, first name and last name.

Affected products

• Mattermost Mattermost: from 7.8.0, before 7.8.8 (fixed in 7.8.8); from 7.9.0, before 7.9.6 (fixed in 7.9.6); from 7.10.0, before 7.10.4 (fixed in 7.10.4)

Published 2023-08-11. Last modified 2026-06-17.