The remote web server contains a PHP application that is affected by a cross-site scripting vulnerability.
The version of Nagios XI hosted on the remote web server fails to properly sanitize input to the login.php script. An attacker can leverage this issue by enticing a user to follow a malicious URL, causing attacker-specified script code to run inside the user's browser in the context of the affected site. Information harvested this way may aid in launching further attacks.
Upgrade to Nagios XI 2011R1.9 build 20111213 or later.