Day 1 of 30 Days — 30 Vulnerabilities Tips & Tricks

Day 1: Mastering Reflected XSS — Essential Tricks & Techniques Based on Personal Experience and Valuable POCs
[ In collaboration with Abhijeet Kumawat ( his LinkedIn | Twitter)]

Hey geeks, it4chis3c here with another write-up about Reflected XSS vulnerability.

Introduction

Cross-Site Scripting (XSS) is one of the most common and dangerous vulnerabilities found in web applications. It allows an attacker to inject malicious scripts into web pages, which can then be executed by other users’ browsers. Among the various types of XSS, Reflected XSS (R-XSS) is particularly notorious due to its widespread occurrence and potential for immediate impact.

In this blog, I’ll share my insights and experiences in mastering Reflected XSS, along with practical tips, advanced payloads, and tricks for bypassing Web Application Firewalls (WAF). This guide is built on personal experience, valuable blogs, and Proofs of Concept (POCs) that have proven effective in real-world scenarios.

1. How to Detect Reflected XSS

• Submit a Benign String:
• Begin by submitting a unique, benign alphabetical string to every user input field. This string should not appear anywhere in the application and should be something like myxsstestdmqlwp. The purpose of using a unique string is to easily identify its reflection in the application’s responses.