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.
2025-10-31T13:15:33.057
2025-11-06T18:12:02.937
Analyzed
CVSSv3.1: 5.4 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | nagios | nagios_xi | < 2024 | Yes |
| Application | nagios | nagios_xi | 2024 | Yes |
| Application | nagios | nagios_xi | 2024 | Yes |
| Application | nagios | nagios_xi | 2024 | Yes |