CVE•Published 2025-10-30•Modified 2026-10-07•1 article on news•5 live references•NVD data

CVE-2025-34271Nagios · Log_server

Vulnerability data via NVD (ingested)

CVSS v3.1

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS percentile

Exploit Prediction Scoring System · top 47% of all CVEs

Weaknesses (CWE)

CWE-319Cleartext Transmission of Sensitive Information

Description

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 configuration. As a result, an attacker positioned on the network path can intercept credentials in transit. Captured credentials could allow the attacker to authenticate as a cluster node or service account, enabling further unauthorized access, lateral movement, or system compromise.

Timeline

Published 2025-10-30

Modified 2026-10-07

External references

NVD MITRE Exploit-DB GitHub PoC VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2025-34271

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Nagios Log Server"

All exposed Nagios Log Server instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Log Server"

HTTP body or banner mentions "Log Server" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2025-34271