What’s Vulnerable › Vulnerabilities

CVE-2024-13992: Nagios XI < 2024R1.1 XSS via Missing Page / 404

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-31 · updated 2026-10-02
• Weakness: CWE-79

Description

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.

Affected products

• Nagios XI: before 2024; 2024-r1, 2024-r1.0.1, 2024-r1.0.2 — fixed in 2024

How to fix

Upgrade to a fixed version: Nagios XI 2024. Check the vendor advisory for mitigations.

References

• https://www.nagios.com/changelog/nagios-xi/2024r1-1/
• https://www.nagios.com/products/security/#nagios-xi
• https://www.vulncheck.com/advisories/nagios-xi-xss-via-missing-page

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