What’s Vulnerable › Vulnerabilities

CVE-2025-34274: Nagios Log Server < 2024R2.0.3 Logstash Process Root Privileges

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-30 · updated 2026-10-07
• Weakness: CWE-250

Description

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 products

• Nagios Log Server: before 2024; 2024-r1, 2024-r1.0.1, 2024-r1.0.2, 2024-r1.1, 2024-r1.2, 2024-r1.3 (+8) — fixed in 2024

How to fix

Upgrade to a fixed version: Nagios Log Server 2024. Check the vendor advisory for mitigations.

References

• https://www.nagios.com/changelog/#log-server
• https://www.nagios.com/products/security/#log-server-2024R2
• https://www.vulncheck.com/advisories/nagios-log-server-logstash-process-root-privileges

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