Testing for parameter pollution is essential in bug bounty hunting. Duplicate parameters can lead to bypassing security controls like authentication and access control lists (ACLs), WAF evasion, and business logic flaws such as price manipulation and privilege escalation. Make sure to include parameter pollution testing in your security assessments to uncover these vulnerabilities.
? Bug Bounty Tip: Always Test for Parameter Pollution!
Many applications fail to handle duplicate parameters properly, leading to:
?? Bypassing security controls (Auth, ACLs)
?? WAF evasion (IDS/IPS bypass)
?? Business logic flaws (Price manipulation, privilege escalation)— Hitanshi Patel (@hitanshi_patel_) March 8, 2025