CVE-2025-4573: LDAP Injection in Mattermost Enterprise Edition When Using Active Directory

Severity: medium (CVSS 4.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-06-11 · updated 2026-06-17
Weakness: CWE-90

Description

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: from 9.11.0 before 9.11.14; from 10.5.0 before 10.5.5; from 10.6.0 before 10.6.4; from 10.7.0 before 10.7.2 — fixed in 10.5.5, 10.6.4, 10.7.2, 9.11.14

How to fix

Upgrade to a fixed version: Mattermost 10.5.5, 10.6.4, 10.7.2, 9.11.14. Check the vendor advisory for mitigations.

References

https://mattermost.com/security-updates

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