Day 14 of 30 Days — 30 Vulnerabilities | HTTP Parameter Pollution (HPP) Vulnerability

Day 14: Mastering HTTP Parameter Pollution (HPP) Vulnerability — Essential Tricks & Techniques Based on Personal Experience and Valuable POCs

[ In collaboration with Abhijeet Kumawat ( his LinkedIn | Twitter)]

Hey geeks, it4chis3c (Twitter) here with one more write-up on tricks & tips to detect HTTP Parameter Pollution (HPP)Vulnerability.

1. Brief Description

Definition:
HTTP Parameter Pollution (HPP) is a web application vulnerability that occurs when multiple HTTP parameters with the same name are submitted in a single request, leading to unexpected behaviors.

Impact:
This can lead to security issues like bypassing input validation, unauthorized access, or even enabling attacks such as XSS, SQL Injection, or Open Redirects.

Use Cases:
Commonly seen in scenarios involving query strings, form submissions, and URL parameters.

2. Where to Detect

• Query Parameters: Inspect URLs with multiple parameters that may be vulnerable to duplicate keys.
• Form Data: Analyze form submissions where input fields…