Cross-site scripting (XSS) vulnerability in MantisBT before 1.2.2 allows remote authenticated users to inject arbitrary web script or HTML via an HTML document with a .gif filename extension, related to inline attachments.
https://bugzilla.redhat.com/show_bug.cgi?id=620992
http://www.openwall.com/lists/oss-security/2010/08/03/7
http://www.openwall.com/lists/oss-security/2010/08/02/16