Bugzilla before 3.0.11, 3.2.x before 3.2.6, 3.4.x before 3.4.5, and 3.5.x before 3.5.3 does not block access to files and directories that are used by custom installations, which allows remote attackers to obtain sensitive information via requests for (1) CVS/, (2) contrib/, (3) docs/en/xml/, (4) t/, or (5) old-params.txt.
https://exchange.xforce.ibmcloud.com/vulnerabilities/56003
https://bugzilla.mozilla.org/show_bug.cgi?id=434801
https://bugzilla.mozilla.org/show_bug.cgi?id=314871
http://www.vupen.com/english/advisories/2010/0261
http://www.securityfocus.com/bid/38025
http://www.securityfocus.com/archive/1/509282/100/0/threaded