CVE-2023-5193: Mattermost

Low severity, CVSS 2.7. EPSS: 0.6% chance of exploitation in the next 30 days.

Mattermost fails to properly check permissions when retrieving a post allowing for a System Role with the permission to manage channels to read the posts of a DM conversation.

Affected products

• Mattermost Mattermost: from 7.0.0, before 7.8.10 (fixed in 7.8.10); from 8.0.0, before 8.0.2 (fixed in 8.0.2); from 8.1.0, before 8.1.1 (fixed in 8.1.1)

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