CVE-2020-36862

Nagios XI < 5.6.11 Unauthenticated XSS and SSRF via Highcharts

Published Oct 30, 2025 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Nagios addresses this vulnerability as "Fixed unauthenticated XSS/SSRF in highcharts local exporting tool."

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Nagios nagios Xi
CPEs cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*
Vendors & Products Nagios nagios Xi
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Nagios
Nagios xi
Vendors & Products Nagios
Nagios xi
Type Values Removed Values Added
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.
Title Nagios XI < 5.6.11 Unauthenticated XSS and SSRF via Highcharts
Weaknesses CWE-79
CWE-918
References
Metrics cvssV4_0

{'score': 6.9, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 17, 2025, 6:21 PM
Reserved
Oct 30, 2025, 1:06 PM
Status
Analyzed
Published
Oct 30, 2025, 10:15 PM
Modified
Oct 18, 2026, 12:10 AM