CVE-2023-2020: Checkmk

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Insufficient permission checks in the REST API in Tribe29 Checkmk <= 2.1.0p27 and <= 2.2.0b4 (beta) allow unauthorized users to schedule downtimes for any host.

Affected products

• Checkmk Checkmk: version 2.1.0 only; version 2.2.0 only

Published 2023-04-18. Last modified 2026-06-17.