Vulnerability in Nagios Xi
CVE-2025-34287
Nagios XI versions prior to 2024R2 contain an improperly owned script, process_perfdata.pl, which is executed periodically as the nagios user but owned by www-data. Because the file was writable by www-data, an attacker with web server privileges could modify its contents, leading to arbitrary code execution as the nagios user when the script is next run. This improper ownership and permission configuration enables local privilege escalation.
EPSS: 0.003 (19.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Nagios Nagios_xi — versions 2024
- Nagios Xi — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (release-notes, Release Notes, patch)
- disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2025-34287?
- CVE-2025-34287 is a high-severity vulnerability in Nagios Xi, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.8/10. Published 2025-10-30.
- How severe is CVE-2025-34287?
- High severity. CVSS v3 base score is 7.8 out of 10.