[security vulnerability] upload arbitrary files

[GatekeeperBuster]

Recently, our team has identified a security vulnerability in the latest version of project. This vulnerability allows attackers to potentially upload arbitrary files to the server through malicious requests, thereby gaining control over server permissions.
The logic of the vulnerability is present in the following files: com/central/file/controller/FileController.java#upload.

Developers did not check the filename of the uploaded file when using com/central/file/service/impl/FastdfsService.java#uploadFile() to upload the file.

As a result, attackers could exploit this by submitting a malicious filename, such as ../../../pwned.txt, to achieve arbitrary file upload, which poses a threat to server security.