Part 2: $1000 Bug Bounty Guide — Advanced JavaScript Analysis for Hidden Vulnerabilities

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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!

PART-1 ARTICLE : LINK

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JavaScript files can be a goldmine for security researchers, penetration testers, and bug bounty hunters. Many times, critical API endpoints, parameters, and authentication mechanisms are embedded within JavaScript but are not immediately visible through automated tools. In this article, I will share a deep-dive methodology to uncover hidden API endpoints and parameters that are often missed, especially by automated tools.

One of the simplest but most effective techniques for finding hidden API calls in JavaScript files is using Ctrl + F and searching for common patterns such as:

Single or double quotes (' or ")API-related keywords like endpoint, url, request, fetch, ajax, GET, POSTStrings that contain /api/, /v1/, /data/…

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