The WebService (XML-RPC) interface in Bugzilla 2.23.3 through 3.0.0 does not enforce permissions for the time-tracking fields of bugs, which allows remote attackers to obtain sensitive information via certain XML-RPC requests, as demonstrated by the (1) Deadline and (2) Estimated Time fields.
https://exchange.xforce.ibmcloud.com/vulnerabilities/36244
https://bugzilla.mozilla.org/show_bug.cgi?id=382056
http://www.vupen.com/english/advisories/2007/2977
http://www.securitytracker.com/id?1018604
http://www.securityfocus.com/archive/1/477630/100/0/threaded
http://www.bugzilla.org/security/2.20.4/
http://security.gentoo.org/glsa/glsa-200709-18.xml
http://secunia.com/advisories/26971