CVE-2023-3584: Mattermost Server

Low severity, CVSS 3.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Mattermost fails to properly check the authorization of POST /api/v4/teams when passing a team override scheme ID in the request, allowing an authenticated attacker with knowledge of a Team Override Scheme ID to create a new team with said team override scheme.

Affected products

• Mattermost Mattermost Server: from 7.8.0, before 7.8.5 (fixed in 7.8.5); from 7.10.0, before 7.10.3 (fixed in 7.10.3)

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