The tweet includes a link to advanced techniques for penetration testing that can be used to bypass various Web Application Firewalls (WAFs). The purpose of the content is educational. More information is needed to determine the specific WAF vendor affected. It would be advisable to review the techniques in the provided link for further analysis.
For more details, check out the original tweet here: https://twitter.com/UndercodeUpdate/status/1900873066529382876