This tweet mentions a potential WAF bypass related to Vercel but does not provide details on the vulnerability type or the payload used. It questions whether Vercel will pay $50,000 for the bypass, indicating a possible bug bounty or security reward. Since there are no technical details or payloads provided, we cannot specify the method or type of bypass. The mention of FirsOff suggests either a team or tool related to the bypass. More information is needed to fully analyze this bypass or write a detailed blog post.
For more details, check out the original tweet here: https://twitter.com/alexdolbun/status/1997637651172630612