Nagios XI versions prior to < 2024R1.1 is vulnerable to a cross-site scripting (XSS) when a user visits the "missing page" (404) page after following a link from another website. The vulnerable component, page-missing.php, fails to properly validate or escape user-supplied input, allowing an attacker to craft a malicious link that, when visited by a victim, executes arbitrary JavaScript in the victim’s browser within the Nagios XI domain.
Use CWE-79, Nagios vendor hub and Nagios Xi product page to widen CVE-2024-13992 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2024-13997, CVE-2025-34286 and CVE-2026-2043 for nearby disclosures in the same product family.