Cross-site scripting (XSS) vulnerability in Best Practical Solutions RT 3.6.x before 3.6.9, 3.8.x before 3.8.5, and other 3.4.6 through 3.8.4 versions allows remote attackers to inject arbitrary web script or HTML via certain Custom Fields.
The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.