CVE-2025-2475: Mattermost Server

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to invalidate the cache when a user account is converted to a bot which allows an attacker to login to the bot exactly one time via normal credentials.

Affected products

• Mattermost Mattermost Server: from 9.11.0, before 9.11.10 (fixed in 9.11.10); from 10.4.0, before 10.4.4 (fixed in 10.4.4); from 10.5.0, before 10.5.2 (fixed in 10.5.2)

Published 2025-04-14. Last modified 2026-06-17.