file-upload-bypass

Bypass file upload restrictions for remote code execution by circumventing extension checks, content-type validation, and magic byte inspection. You can also exploit server configurations like .htaccess or web.config to enable malicious webshell execution on the target server.

Use exiftool to manipulate file metadata and inject malicious payloads, allowing your webshell to bypass magic byte inspection. This technique helps disguise the file so that server-side validation routines accept the upload without detecting the embedded code.

Yes, exploit .htaccess or web.config files to alter server configurations and enable webshell execution. By uploading these server-specific configuration files, you can bypass extension restrictions and map custom file types to executable handlers.

Exploiting ZIP archives works for bypassing file upload validation through path traversal and null byte filename truncation techniques. This approach allows you to plant webshells by manipulating archive extraction logic on the target web server.

File upload bypass attempts fail against server-side processing validation when the server inspects internal file structures rather than just extensions or headers. Exploiting vulnerabilities in server-side processors like ImageMagick can help circumvent these strict validation checks.

The best way to test file upload vulnerabilities is to intercept upload requests using Burp Suite and analyze file structures with exiftool. This combination allows you to systematically test extension, content-type, and magic byte bypass techniques to achieve code execution.