yshopmall V1.0 has an arbitrary file upload vulnerability, which can enable RCE or even take over the server when improperly configured to parse JSP files.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.