Tenable Appliance versions 4.6.1 and earlier have been found to contain a single XSS vulnerability. Utilizing a specially crafted request, an authenticated attacker could potentially execute arbitrary JavaScript code by manipulating certain URL parameters related to offline plugins.
Tenable Appliance 3.5 - 4.4.0, and possibly prior versions, contains a flaw in the simpleupload.py script in the Web UI. Through the manipulation of the tns_appliance_session_user parameter, a remote attacker can inject arbitrary commands.