---
id: CVE-2025-34271
title: "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 configu…"
summary: "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 configu…"
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-319
vendor: nagios
product: log_server
affected:
  - log_server < 2024
  - log_server = 2024
patched:
  - log_server 2024
published: '2025-10-30'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T21:10:00.200'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-34271'
references:
  - url: 'https://www.nagios.com/changelog/#log-server'
    label: disclosure@vulncheck.com
  - url: 'https://www.nagios.com/products/security/#log-server-2024R2'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/nagios-log-server-cluster-manager-credential-requests-sent-over-plaintext
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00744
epssPercentile: 0.53303
ingestedAt: '2026-10-07T21:54:14.904Z'
---

## Overview

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.

## Affected

- `log_server < 2024`
- `log_server = 2024`

## Remediation

Upgrade past the affected range:

- `log_server 2024`