Cross-site scripting (XSS) vulnerability in the dependency graphs in Bugzilla 2.16rc1 through 4.4.11, and 4.5.1 through 5.0.2 allows remote attackers to inject arbitrary web script or HTML.
https://www.bugzilla.org/security/4.4.11/
http://www.securitytracker.com/id/1035891
http://www.securityfocus.com/archive/1/538401/100/0/threaded
http://packetstormsecurity.com/files/137079/Bugzilla-4.4.11-5.0.2-Summary-Cross-Site-Scripting.html