CVE-2023-3613: Mattermost Server

Low severity, CVSS 3.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Mattermost WelcomeBot plugin fails to to validate the membership status when inviting or adding users to channels allowing guest accounts to be added or invited to channels by default.

Affected products

• Mattermost Mattermost Server: before 7.8.6 (fixed in 7.8.6); from 7.9.0, before 7.10.3 (fixed in 7.10.3)

Published 2023-07-17. Last modified 2026-06-17.