What’s Vulnerable › Vulnerabilities

CVE-2011-10036: Nagios XI < 2011R1.9 XSS via backend_url JavaScript Link Handler

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-30 · updated 2026-10-18
• Weakness: CWE-79

Description

Nagios XI versions prior to 2011R1.9 are vulnerable to cross-site scripting (XSS) via the handling of the "backend_url" JavaScript link. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

Affected products

• Nagios XI: through 2009; 2011-r1, 2011-r1.1, 2011-r1.2, 2011-r1.3, 2011-r1.4, 2011-r1.5 (+3)

References

• https://www.nagios.com/changelog/nagios-xi/
• https://www.vulncheck.com/advisories/nagios-xi-xss-via-backend-url-javascript-link-handler

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