The tweet mentions a successful bypass of the Berlin WAF using a payload for R-XSS vulnerability. The payload used is "><?/script><?script>alert(document.domain)<?/script>". This bypass highlights the importance of testing WAFs for different vulnerabilities like XSS. As a security tip for researchers, exploring WAF bypass techniques can uncover critical vulnerabilities in systems.
Check out the original tweet here: https://twitter.com/t0t3kingpad4/status/1800833416491049416