This tweet highlights a security issue where bypassing a Web Application Firewall (WAF) combined with a Cross-Site Scripting (XSS) vulnerability and a business logic flaw can lead to an account takeover. Although the tweet does not specify the payload used or the WAF vendor, it emphasizes the significant risk of chaining these vulnerabilities. WAFs are security tools designed to block attacks targeting web applications, including XSS attacks, which allow attackers to inject malicious scripts into web pages viewed by other users. Business logic flaws are weaknesses in the design or implementation of application workflows that can be exploited to perform unauthorized actions. When an attacker successfully bypasses the WAF's protections and exploits an XSS vulnerability alongside a business logic flaw, they can potentially take over user accounts by manipulating application functionality and sessions. This scenario underscores the importance of robust WAF configurations, thorough security testing for XSS vulnerabilities, and ensuring proper validation and controls in business logic to protect user accounts and prevent unauthorized access.
For more details, check out the original tweet here: https://twitter.com/bountywriteups/status/1967682157385482365