openviglet shio ShStaticFileAPI.java shStaticFileUpload unrestricted upload

A vulnerability classified as critical has been found in openviglet shio up to 0.3.8. Affected is the function shStaticFileUpload of the file shio-app/src/main/java/com/viglet/shio/api/staticfile/ShStaticFileAPI.java. The manipulation of the argument filename leads to unrestricted upload. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.