This tweet describes the discovery of a reflected Cross-Site Scripting (XSS) vulnerability on the MOD UK Police website. The tweet mentions that the vulnerability involves bypassing the Web Application Firewall (WAF), but it does not provide specific details about the payload used or the WAF vendor. Reflected XSS vulnerabilities occur when an attacker can inject malicious scripts into web pages that are reflected back to the user, often in error messages or search results. Successfully bypassing a WAF means the attacker found a way to send malicious input that is not blocked by security filters, allowing the exploit to work. Without details of the payload or vendor, the focus is on the importance of WAF bypass techniques to find and exploit XSS vulnerabilities on high-profile websites like the MOD UK Police site.
Check out the original tweet here: https://twitter.com/bbwriteups/status/1966898279704400279