This tweet highlights a Unicode-based Cross-Site Scripting (XSS) bypass technique that can evade many Web Application Firewalls (WAFs). The bypass leverages Unicode encoding to craft XSS payloads that remain undetected by traditional WAF signature or pattern matching. Unicode encoding can obscure the payload from the WAF's filters while still being correctly interpreted by browsers, leading to potential script execution on vulnerable web applications. This technique is especially relevant for security researchers and penetration testers as it demonstrates a sophisticated method to test the resilience of WAFs against XSS attacks. The tweet also includes a video demonstrating the method, serving as an educational resource to understand and improve WAF defenses against Unicode and encoding-based bypasses.