Part 1- Exploiting Content Injection & Info Disclosure: A High-Impact Bug Worth Big Rewards!

About Me

Hi everyone! My name is Satyam Pawale, also known as @hackersatty in the bug bounty world. I started bug hunting in 2024 and have been passionate about finding security vulnerabilities ever since.

This blog is meant to share my experience and help others learn from it. If you like it or have any feedback, feel free to drop a comment below. Let’s get started!

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Introduction

Security vulnerabilities can often go unnoticed until they are exploited by malicious actors. In this report, I am sharing details of a high-impact security flaw I discovered on a web application (referred to as xyz.com). This vulnerability, a combination of Content Injection and Information Disclosure, exposed users to phishing attacks, social engineering threats, and unauthorized data collection.

Summary of the Vulnerability

The vulnerability allowed attackers to manipulate the content of a page by injecting arbitrary text through user-supplied data. Additionally, crafted URLs could be used to redirect users to malicious pages, exposing sensitive details such as their IP address, system information, and browser metadata.

This issue is particularly severe because:

• Attackers can deceive users…