Web Application Firewall Bypassed via JS Injection with Parameter Pollution

In a recent autonomous penetration test, a novel cross-site scripting (XSS) bypass that sidesteps even highly restrictive Web Application Firewalls (WAFs). Security researchers uncovered a ASP.NET application protected by a rigorously configured WAF. Conventional XSS payloads—breaking out of single-quoted JavaScript strings—were promptly blocked. Yet by abusing HTTP parameter pollution, the team managed to split malicious […]

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