RCE in Nagios Xi
CVE-2025-34227
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.254 (97.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 97.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.243 · newest: 0.254 · change: +0.011
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.nagios.com/changelog/ (vendor-advisory, Release Notes, patch)
- www.nagios.com/products/security/ (vendor-advisory, patch, Vendor Advisory)
- www.vulncheck.com/advisories/nagios-xi-config-wizard-auth-command-injection (Third Party Advisory, third-party-advisory)
- theyhack.me/CVE-2025-34227-Nagios-XI-Wizard-Command-Injection/ (Exploit, technical-description, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2025-34227?
- CVE-2025-34227 is a high-severity vulnerability in Nagios Xi, classified under OS Command Injection. CVSS score: 8.8/10. Published 2025-09-25.
- How severe is CVE-2025-34227?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-34227 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.