CVE-2023-5194: Mattermost

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Mattermost fails to properly validate permissions when demoting and deactivating a user allowing for a system/user manager to demote / deactivate another manager

Affected products

• Mattermost Mattermost: from 7.0.0, before 7.8.10 (fixed in 7.8.10); from 8.0.0, before 8.1.1 (fixed in 8.1.1)

Published 2023-09-29. Last modified 2026-06-17.