The tweet mentions an XSS WAF bypass using the payload 'app.alert(1)' that has been around for days/weeks. It suggests that the individual claims to have discovered a new payload, but it is not original and has been known for years. The tweet criticizes the person for seeking attention and predicts their eventual disappearance. This highlights the importance of verifying the credibility and novelty of claimed vulnerabilities.
Original tweet: https://twitter.com/rinz0h/status/1800611364592927043