CVE-2021-40904: Checkmk

High severity, CVSS 8.8. EPSS: 3.7% chance of exploitation in the next 30 days.

The web management console of CheckMK Raw Edition (versions 1.5.0 to 1.6.0) allows a misconfiguration of the web-app Dokuwiki (installed by default), which allows embedded php code. As a result, remote code execution is achieved. Successful exploitation requires access to the web management interface, either with valid credentials or with a hijacked session by a user with the role of administrator.

Affected products

• Checkmk Checkmk: from 1.5.0, before 1.6.0 (fixed in 1.6.0)

Published 2022-03-25. Last modified 2026-07-09.