---
id: CVE-2025-34274
title: >-
  Nagios Log Server versions prior to 2024R2.0.3 contain an execution with
  unnecessary privileges vulnerability as it runs its embedded Logstash process
  as the root user
summary: >-
  Nagios Log Server versions prior to 2024R2.0.3 contain an execution with
  unnecessary privileges vulnerability as it runs its embedded Logstash process
  as the root user. If an attacker is able to compromise the Logstash process -
  for exam…
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-250
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-2025-34274'
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-logstash-process-root-privileges
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.02076
epssPercentile: 0.8088
ingestedAt: '2026-10-07T21:54:14.905Z'
---

## Overview

Nagios Log Server versions prior to 2024R2.0.3 contain an execution with unnecessary privileges vulnerability as it runs its embedded Logstash process as the root user. If an attacker is able to compromise the Logstash process - for example by exploiting an insecure plugin, pipeline configuration injection, or a vulnerability in input parsing - the attacker could execute code with root privileges, resulting in full system compromise. The Logstash service has been altered to run as the lower-privileged 'nagios' user to reduce this risk associated with a network-facing service that can accept untrusted input or load third-party components.

## Affected

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

## Remediation

Upgrade past the affected range:

- `log_server 2024`