XSS in Nagios Xi
CVE-2020-36862
Nagios XI versions prior to 5.6.11 contain unauthenticated vulnerabilities in the Highcharts local exporting tool. Crafted export requests could (1) inject script into exported/returned content due to insufficient output encoding (XSS), and (2) cause the server to fetch attacker-specified URLs (SSRF), potentially accessing internal network resources. An unauthenticated remote attacker can leverage these issues to execute script in a user's browser when the exported content is viewed and to disclose sensitive information reachable from the export server via SSRF.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.006 (44.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Nagios Nagios_xi
- 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-2020-36862?
- CVE-2020-36862 is a medium-severity vulnerability in Nagios Xi, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-10-30.
- How severe is CVE-2020-36862?
- Medium severity. CVSS v3 base score is 6.1 out of 10.