Cross-site scripting vulnerability exists in WP Admin UI Customize versions prior to ver 1.5.14. If a malicious admin user customizes the admin screen with some malicious contents, an arbitrary script may be executed on the web browser of the other users who are accessing the admin screen.
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.