This tweet highlights an important security challenge: hackers often bypass Web Application Firewalls (WAFs) to exploit vulnerabilities that the firewall rules may miss. Penetration testers use similar bypass techniques to identify hidden security risks that are not detected by standard firewall protections. This helps organizations get a complete view of their security posture by revealing vulnerabilities that might otherwise remain hidden behind the WAF. The tweet doesn't specify a particular WAF vendor or a specific kind of vulnerability bypassed, indicating the general difficulty in relying solely on WAFs for security. It's a reminder that security teams need comprehensive strategies beyond just rule-based firewalls to protect web applications effectively.
For more insights, check out the original tweet here: https://twitter.com/M365FSA/status/1957209341418959053