CScms 4.1 allows arbitrary file upload by (for example) adding the php extension to the default filetype list (gif, jpg, png), and then providing a .php pathname within fileurl JSON data.
Cscms 4 allows CSRF for creating a member via upload/admin.php/user/save, authenticating vip members via upload/admin.php/user/init/tid and upload/admin.php/user/init/rzid, and creating a super administrator and web editor via upload/admin.php/sys/save.