pentester.land· Jan 22, 2019· by Youssef Sammouda (@samm0uda)

Uploading files to api.techprep.fb.com

Target Program: Meta / Facebook

🎯 Vulnerability: Cross-Site Scripting (XSS)

💡 Defense Fix: Enforce Context-Aware Output Encoding, strict Content-Security-Policy (CSP), and HttpOnly cookie flags.

#XSS#File upload