CVE-2025-34227: nagios nagios_xi OS Command Injection

Vulnerability summary

CVE-2025-34227 is a high (CVSS 8.8) OS Command Injection vulnerability in nagios nagios_xi. EPSS estimates a 25.35% chance of exploitation in the next 30 days, higher than 97.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 25-09-2025
   PublishedVulnerability first disclosed.
2. 15-05-2026
   Last modifiedVulnerability information updated.

Description

Nagios XI < 2026R1 is vulnerable to an authenticated command injection vulnerability within the MongoDB Database, MySQL Query, MySQL Server, Postgres Server, and Postgres Query wizards. It is possible to inject shell characters into arguments provided to the service and execute arbitrary system commands on the underlying host as the `nagios` user.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.