Nagios XI versions prior to < 2024R1.1.2 are vulnerable to a reflected cross-site scripting (XSS) via the login page when accessed with older web browsers. Insufficient validation or escaping of user-supplied input reflected by the login page can allow 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 origin. The issue is observable under legacy browser behaviors; modern browsers may mitigate some vectors.
2025-10-30T22:15:44.623
2025-11-06T16:18:50.893
Analyzed
CVSSv3.1: 6.1 (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 |
| Application | nagios | nagios_xi | 2024 | Yes |