Discovery often starts with identifying an upload form. In many "Zipper" style challenges, you find a PHP-based upload page that generates a download link for your compressed files.
Insecure handling of file uploads and the use of the zip:// wrapper, which can lead to Remote Code Execution (RCE) . Step 1: Enumeration BG.zip
The application might be using ZipArchive in PHP to bundle files before storing them in an /uploads/ directory. Step 2: Exploitation (Webshell Upload) Discovery often starts with identifying an upload form