CVE-2025-4573: Mattermost Server

Medium severity, CVSS 4.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Mattermost versions 10.7.x <= 10.7.1, 10.6.x <= 10.6.3, 10.5.x <= 10.5.4, 9.11.x <= 9.11.13 fail to properly validate LDAP group ID attributes, allowing an authenticated administrator with PermissionSysconsoleWriteUserManagementGroups permission to execute LDAP search filter injection via the PUT /api/v4/ldap/groups/{remote_id}/link API when objectGUID is configured as the Group ID Attribute.

Affected products

• Mattermost Mattermost Server: from 9.11.0, before 9.11.14 (fixed in 9.11.14); from 10.5.0, before 10.5.5 (fixed in 10.5.5); from 10.6.0, before 10.6.4 (fixed in 10.6.4); from 10.7.0, before 10.7.2 (fixed in 10.7.2)

Published 2025-06-11. Last modified 2026-06-17.