hunt-file-upload

File upload vulnerability testing involves targeting the application's upload endpoint to identify issues like RCE, XSS, SSRF, and path traversal. Security professionals use this assessment to ensure web applications are secure against common file upload attack vectors.

Bypass techniques for file upload security controls include extension bypass, null byte injection, double extension manipulation, and MIME spoofing. These methods exploit weaknesses in how the web application validates file types and content before saving.

MIME spoofing bypasses content type checks by manipulating the Content-Type header to match an allowed type while the actual file content contains malicious code. This exploits web applications that rely solely on header validation for file upload security.

Yes, you need prior knowledge of web application security and common vulnerability exploitation methods to effectively use file upload bypass testing. Understanding attack vectors like RCE, XSS, and path traversal is required to accurately demonstrate and assess results.

The best way to identify path traversal via file upload features is to attempt uploading files with manipulated filenames containing directory traversal sequences. This demonstrates whether the web application properly sanitizes file paths before saving the uploaded content.