Nagios XI is prone to multiple cross-site scripting vulnerabilities because it fails to properly sanitize user-supplied input. An attacker may leverage these issues to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookie-based authentication credentials and to launch other attacks. Nagios XI 2009R1.3B is vulnerable prior versions may also be affected.
Updates are available. Please see the references for more information.