Launchpad.net

CVE 2015-5059

The "Project Documentation" feature in MantisBT 1.2.19 and earlier, when the threshold to access files ($g_view_proj_doc_threshold) is set to ANYBODY, allows remote authenticated users to download attachments linked to arbitrary private projects via a file id number in the file_id parameter to file_download.php.

See the CVE page on Mitre.org for more details.