A vulnerability, which was classified as critical, was found in zhangyanbo2007 youkefu up to 4.2.0. Affected is the function Upload of the file youkefu-mastersrcmainjavacomukefuwebimwebhandlerresourceMediaController.java. The manipulation of the argument imgFile leads to unrestricted upload. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.
Access control involves the use of several protection mechanisms such as:
When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: