CVE Catalog

CVE-2025-39665

MediumCVSS 5.3
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.26%

16th percentile - higher than 16% of all known CVEs

Summary

User enumeration in Nagvis' Checkmk MultisiteAuth before version 1.9.48 allows an unauthenticated attacker to enumerate Checkmk usernames.

Risk Assessment

Disclosure of valid usernames facilitates brute-force and social engineering attacks against the Checkmk system.

Recommendation

Update Nagvis' Checkmk MultisiteAuth to version 1.9.48 or later.

Related vulnerabilities

Original NVD description (English source)

User enumeration in Nagvis' Checkmk MultisiteAuth before version 1.9.48 allows an unauthenticated attacker to enumerate Checkmk usernames.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS