Checkmk · Checkmk · CVE-2025-39665
**Name of the Vulnerable Software and Affected Versions**
Nagvis Checkmk MultisiteAuth versions prior to 1.9.48
**Description**
An unauthenticated attacker can enumerate Checkmk usernames. This issue affects the user enumeration functionality within the software.
**Recommendations**
Update to version 1.9.48 or later.