This tweet highlights a common scenario in web application security testing where a tester tries to bypass a Web Application Firewall (WAF) using a simple payload modification, specifically by appending a comma (,). The tester is questioned about the rationale behind using this payload again, suggesting that the WAF might be blocking it because it contains an alert function or keyword that triggers security rules. The advice is to consider alternative payload methods rather than repeating the same approach. This indicates the importance of creativity and variety in payload crafting to bypass WAFs effectively. However, the tweet does not specify the exact vendor or type of WAF being targeted, and the payload itself is minimal, showing the very initial and basic attempt at bypass. For those involved in penetration testing or security research, this emphasizes that single simple payloads may often be detected by WAFs, and more sophisticated or varied techniques are needed.
For more insights, check out the original tweet here: https://twitter.com/Indi4nB0nd/status/1956655261847867794