CVE-2025-2571: Mattermost Server

Medium severity, CVSS 4.2. EPSS: 0.2% chance of exploitation in the next 30 days.

Mattermost versions 10.7.x <= 10.7.0, 10.6.x <= 10.6.2, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fail to clear Google OAuth credentials when converting user accounts to bot accounts, allowing attackers to gain unauthorized access to bot accounts via the Google OAuth signup flow.

Affected products

• Mattermost Mattermost Server: from 9.11.0, before 9.11.13 (fixed in 9.11.13); from 10.5.0, before 10.5.4 (fixed in 10.5.4); from 10.6.0, before 10.6.3 (fixed in 10.6.3); from 10.7.0, before 10.7.1 (fixed in 10.7.1)

Published 2025-05-30. Last modified 2026-06-17.