Cross-site scripting (XSS) vulnerability in showdependencygraph.cgi in Bugzilla 2.x, 3.x, and 4.x before 4.2.16, 4.3.x and 4.4.x before 4.4.11, and 4.5.x and 5.0.x before 5.0.2, when a local dot configuration is used, allows remote attackers to inject arbitrary web script or HTML via a crafted bug summary.
https://www.bugzilla.org/security/4.2.15/
http://www.securitytracker.com/id/1034556
http://www.securityfocus.com/bid/79660
http://seclists.org/bugtraq/2015/Dec/131
http://packetstormsecurity.com/files/135048/Bugzilla-Cross-Site-Scripting-Information-Leak.html