CVE-2006-6574
Mantis before 1.1.0a2 does not implement per-item access control for Issue History (Bug History), which allows remote attackers to obtain sensitive information by reading the Change column, as demonstrated by the Change column of a custom field.
Date published : 2006-12-15
http://www.securityfocus.com/bid/21566
http://sourceforge.net/project/shownotes.php?release_id=469627