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.
Conclusion & alert: CVE-2024-13992 is rated Moderate Risk (46.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.74%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-05-27 | 0.55% | 0.74% | +0.18% |
| 2 | 2026-04-10 | 0.32% | 0.55% | +0.23% |
| 3 | 2026-03-29 | — | 0.32% | — |
Full EPSS history (7 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.1 | 4.0 | MEDIUM |
|
— | — | [email protected] |
| 5.4 | 3.1 | MEDIUM |
|
2.3 | 2.7 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| nagios | nagios_xi | < 2024 | cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:* |
| nagios | nagios_xi | 2024 | cpe:2.3:a:nagios:nagios_xi:2024:r1:*:*:*:*:*:* |
| nagios | nagios_xi | 2024 | cpe:2.3:a:nagios:nagios_xi:2024:r1.0.1:*:*:*:*:*:* |
| nagios | nagios_xi | 2024 | cpe:2.3:a:nagios:nagios_xi:2024:r1.0.2:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://www.nagios.com/changelog/nagios-xi/2024r1-1/ | Release Notes |
| https://www.nagios.com/products/security/#nagios-xi | Vendor Advisory |
| https://www.vulncheck.com/advisories/nagios-xi-xss-via-missing-page | Third Party Advisory |