This tweet points out an important issue with Web Application Firewalls (WAFs). It describes a vulnerability where an attacker can bypass authentication, meaning they can access the system without proper credentials. The WAF rules do not detect this attack and consider the traffic legitimate. This means that even though the WAF is supposed to protect the web application by filtering malicious traffic, it fails in this case because it cannot recognize the malicious requests that bypass the authentication step. This kind of vulnerability is dangerous since authentication is a key security measure, and bypassing it can allow unauthorized access to sensitive data or functionality.
For more insights, check out the original tweet here: https://twitter.com/EdgeDetectOps/status/2037862477648597117