Multiple cross-site scripting (XSS) vulnerabilities in Infopop UBB.Threads before 6.5.2 Beta allow remote attackers to inject arbitrary web script or HTML via the (1) Searchpage parameter to dosearch.php, (2) Number, (3) what, or (4) page parameter to newreply.php, (5) Number, (6) Board, or (7) what parameter to showprofile.php, (8) fpart or (9) page parameter to showflat.php, or (10) like parameter to showmembers.php.