Nagios XI < 2024R1.1.2 Reflected XSS via Login Page on Older Browsers

Vulnerability Description

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.

References

• https://www.nagios.com/products/security/#nagios-xi
• https://www.nagios.com/changelog/nagios-xi/
• https://www.vulncheck.com/advisories/nagios-xi-reflected-xss-via-login-page-on-older-browsers