This tweet discusses the reward comparison between an original CVE (Common Vulnerabilities and Exposures) report submitted to Meta and a WAF bypass found in Vercel's system. The tweet humorously speculates that the bounty for a WAF bypass vulnerability in Vercel might be higher than that for the original bug reported to Meta. However, the tweet does not provide specific technical details about the vulnerability type affected by the WAF bypass, the payload used, or the nature of the bypass. WAF bypasses are important because Web Application Firewalls (WAFs) are security tools designed to block attacks on web applications, such as SQL injection (SQLi), cross-site scripting (XSS), remote code execution (RCE), and others. Bypassing these protections can lead to successful exploitation of underlying vulnerabilities. Without specifics, it's not possible to elaborate on the technical details of this particular bypass, but the context highlights the significance of WAF bypass vulnerabilities in bug bounty hunting and security research.
For more insights, check out the original tweet here: https://twitter.com/xdeludnard/status/1998130938635759820