Vulnerability in Nagios Xi
CVE-2018-25123
Nagios XI versions prior to 5.5.7 contain a privilege escalation vulnerability in the MRTG graphing component. MRTG-related processes/scripts executed with excessive privileges, allowing a local attacker with limited system access to abuse file/command execution paths or writable resources to gain elevated privileges.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.003 (23.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.nagios.com/changelog/nagios-xi/ (release-notes, Release Notes, patch)
- www.vulncheck.com/advisories/nagios-xi-privilege-escalation-via-mrtg-graphing-c… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2018-25123?
- CVE-2018-25123 is a high-severity vulnerability in Nagios Xi, classified under CWE-250. CVSS score: 7.8/10. Published 2025-10-30.
- How severe is CVE-2018-25123?
- High severity. CVSS v3 base score is 7.8 out of 10.