POS Codekop v2.0 was discovered to contain an authenticated remote code execution (RCE) vulnerability via the filename parameter.
https://yuyudhn.github.io/pos-codekop-vulnerability/
https://www.youtube.com/watch?v=Ge0zqY0sGiQ
http://packetstormsecurity.com/files/173278/POS-Codekop-2.0-Shell-Upload.html