Performing HTTP Parameter Pollution Attack When to Use - When testing web applications for input validation bypass vulnerabilities - During WAF evasion testing to split attack payloads across duplicate parameters - When assessing how different technology stacks handle duplicate HTTP parameters - During API security testing to identify parameter precedence issues - When testing OAuth or payment processing flows for parameter manipulation Prerequisites - Burp Suite Professional with Intruder and Repeater modules - Understanding of HTTP protocol and query string parsing - Knowledge of server-sid…