Directory traversal vulnerability in btdownload.php in Blog Torrent preview 0.8 allows remote attackers to download arbitrary files via a .. (dot dot) in the file argument.
https://exchange.xforce.ibmcloud.com/vulnerabilities/18356
http://marc.info/?l=bugtraq&m=110200971917165&w=2
http://cvs.sourceforge.net/viewcvs.py/battletorrent/btorrent_server/btdownload.php?r1=1.6&r2=1.7