The tweet discusses a bypass for Web Application Firewalls (WAF) to execute cross-site scripting (XSS) attacks. The bypass involves reflected XSS into HTML context with most tags and attributes blocked. This can be a significant security issue for websites protected by WAF. A blog post should be created to detail the technique used for the bypass, its implications on web security, and how organizations can mitigate such vulnerabilities.
For more insights, check out the original tweet here: