CVE-2023-22359: Checkmk

Medium severity, CVSS 4.3. EPSS: 0.5% chance of exploitation in the next 30 days.

User enumeration in Checkmk <=2.2.0p4 allows an authenticated attacker to enumerate usernames.

Affected products

• Checkmk Checkmk: version 2.2.0 only

Published 2023-06-26. Last modified 2026-06-17.