file-upload

To test for file upload vulnerabilities, apply a structured methodology using reference payloads to assess upload controls. This involves validating weaknesses by manipulating MIME types, extensions, and magic bytes to document successful exploits and remediation steps.

Common file upload bypass techniques include MIME type validation evasion, extension filtering bypass, magic byte manipulation, and path traversal via filenames. These methods test whether web applications properly sanitize and restrict malicious file uploads.

Yes, this methodology assesses API endpoints and CMS upload features. It provides practical pentest guidance and comprehensive testing methodologies applicable to web apps, APIs, and content management systems to validate upload controls.

Stored XSS via SVG or HTML uploads occurs when an application accepts and serves these files without proper sanitization. Testing this file upload weakness involves injecting malicious scripts into payloads to verify if script execution occurs upon access.

Magic byte manipulation in file upload testing involves altering file signature bytes to spoof file type and bypass server-side content-type validation. This technique checks whether the application relies on insecure validation rather than robust server-side processing.

Document bypass techniques and remediation steps for upload vulnerabilities by recording attempted payloads, server responses, and successful bypass methods. This process provides remediation-oriented insights and secure configuration recommendations for upload handling.