Cross-site scripting (XSS) vulnerability in search.php in phpBB 2.0.3 and possibly earlier versions allows remote attackers to inject arbitrary web script or HTML via the search_username parameter in searchuser mode.
Improper Neutralization of Input During Web Page Generation 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.