xujeff tianti 天梯 UploadController.java ajaxUploadFile unrestricted upload

A vulnerability has been found in xujeff tianti 天梯 up to 2.3. The impacted element is the function ajaxUploadFile of the file src/main/java/com/jeff/tianti/controller/UploadController.java. The manipulation of the argument upfile leads to unrestricted upload. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.