Vulnerability · Published Oct 30, 2025 · Assigned by VulnCheck
CVE-2025-34274Nagios Log Server < 2024R2.0.3 Logstash Process Root Privileges
Critical 9.3
In plain English
A critical-severity security flaw in Log Server from Nagios. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.1% (higher than 82% of all known vulnerabilities).
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Nagios | Log Server | 0 – before 2024R2.0.3 |
Weakness: CWE-250 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
- https://www.nagios.com/products/security/#log-server-2024R2 vendor-advisory, patch
- https://www.nagios.com/changelog/#log-server release-notes, patch
- https://www.vulncheck.com/advisories/nagios-log-server-logstash-process-root-privileges third-party-advisory