What is CVE-2025-34271?

CVE-2025-34271 is a critical-severity vulnerability in Nagios Log Server, classified under Cleartext Transmission of Sensitive Information. CVSS score: 9.8/10. Published 2025-10-30.

How severe is CVE-2025-34271?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Nagios Log Server

CVE-2025-34271

Nagios Log Server versions prior to 2024R2.0.2 contain a vulnerability in the cluster manager component when requesting sensitive credentials from peer nodes over an unencrypted channel even when SSL/TLS is enabled in the product configura…

EPSS: 0.007 (47.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Nagios Log Server — versions 0
Nagios Log_server — versions 2024

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

disclosure@vulncheck.com (vendor-advisory, patch, Vendor Advisory)
disclosure@vulncheck.com (release-notes, Release Notes, patch)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2025-34271?: CVE-2025-34271 is a critical-severity vulnerability in Nagios Log Server, classified under Cleartext Transmission of Sensitive Information. CVSS score: 9.8/10. Published 2025-10-30.
How severe is CVE-2025-34271?: Critical severity. CVSS v3 base score is 9.8 out of 10.