Bugzilla/Attachment.pm in attachment.cgi in Bugzilla 2.x and 3.x before 3.6.12, 3.7.x and 4.0.x before 4.0.9, 4.1.x and 4.2.x before 4.2.4, and 4.3.x and 4.4.x before 4.4rc1 allows remote attackers to read attachment descriptions from private bugs via an obsolete=1 insert action.
https://exchange.xforce.ibmcloud.com/vulnerabilities/80032
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-4141
https://bugzilla.mozilla.org/show_bug.cgi?id=802204
http://www.mandriva.com/security/advisories?name=MDVSA-2013:066