CVE-2020-36862

Nagios XI < 5.6.11 Unauthenticated XSS and SSRF via Highcharts

State: Published
Severity: 6.9 Medium
Published: Oct 30, 2025
Updated: Nov 17, 2025
Reserved: Oct 30, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L	VulnCheck

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')
CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
XINagios	before 5.6.11Affected

References

https://www.nagios.com/changelog/nagios-xi/release-notespatch
https://www.vulncheck.com/advisories/nagios-xi-unauthenticated-xss-and-ssrf-via-highchartsthird-party-advisory

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