Directory traversal vulnerability in the _do_attachment_move function in the AttachFile action (action/AttachFile.py) in MoinMoin 1.9.3 through 1.9.5 allows remote attackers to overwrite arbitrary files via a .. (dot dot) in a file name.
https://bugs.launchpad.net/ubuntu/+source/moin/+bug/1094599
http://www.securityfocus.com/bid/57076
http://www.openwall.com/lists/oss-security/2012/12/30/6
http://www.debian.org/security/2012/dsa-2593
http://ubuntu.com/usn/usn-1680-1
http://secunia.com/advisories/51696
http://secunia.com/advisories/51676
http://secunia.com/advisories/51663