This tweet is promoting a course that will teach how to bypass Web Application Firewalls (WAFs) specifically for Cross-Site Scripting (XSS) vulnerabilities. The course aims to cover various aspects such as how and where to test XSS without triggering WAFs, automation techniques for XSS, in-depth WAF bypass methods, different types of XSS, bypassing Content Security Policy (CSP), and chaining XSS to Account Takeover (ATO) attacks. The course offers live sessions, recorded videos, notes, and scripts for $200. This indicates a comprehensive learning path for anyone wanting to understand WAF bypass techniques related to XSS, applicable against multiple WAF vendors since it is not specific to one.
For more details, check out the original tweet here: https://twitter.com/bug_vs_me/status/2045568673025593545