source: https://www.securityfocus.com/bid/63205/info

Bugzilla is prone to a cross-site scripting vulnerability because it fails to sufficiently sanitize user-supplied input.

Attackers can exploit this issue to steal cookie-based authentication information, execute arbitrary client-side scripts in the context of the browser, and obtain sensitive information. Other attacks are also possible.

Bugzilla versions 4.1.1 through 4.2.6, and 4.3.1 through 4.4 are vulnerable.

Note: This issue exists due to an incomplete fix for CVE-2012-4189 (identified in BID 56504 - Bugzilla Multiple Cross Site Scripting and Information Disclosure Vulnerabilities). 

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