The tweet describes a case manipulation technique used to bypass a Web Application Firewall (WAF) and store malicious input due to lack of input sanitization. This vulnerability can lead to a Cross-Site Scripting (XSS) exploit. The exploit is triggered by clicking a link in an email. More detailed analysis and technical information should be provided to understand the full impact of this bypass.
For more insights, check out the original tweet here: https://twitter.com/daveed_wux/status/1812404860903408038