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Learn Bug Bounty Hunting & Web Security Testing From Scratch (Udemy.com)

Learn how to discover bugs / vulnerabilities like experts | OWASP top 10 + more | No prior knowledge required

Created by: Zaid Sabih

Last updated September 2025

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What you will learn

  • 95+ videos to teach you bug hunting & security testing from scratch.
  • 80+ hands-on real-life examples - from simple to advanced.
  • Discover the most common web application bugs and vulnerabilities.
  • Discover bugs from the OWASP top 10 most common security threats.
  • Bypass filters & security on all of the covered bugs & vulnerabilities.
  • 2 Hour LIVE bug hunt / pentest on a real web application at the end of the course.
  • My approach to bug hunting and web application penetration testing.
  • The bug hunter / hacker mentality.
  • Efficiency use Burp Suite to discover bugs and vulnerabilities.
  • Discover sensitive & hidden information, paths, files, endpoints and subdomains
  • Gather information about websites & applications
  • Essential topics to bounty hunting.
  • HTTP methods & status codes.
  • Cookies & cookie manipulation
  • HTML basics for bug hunting.

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Course Description

Welcome to my comprehensive course on Bug Bounty Hunting & Web Security Testing course. This course assumes you have NO prior knowledge, it starts with you from scratch and takes you step-by-step to an advanced level, able to discover a large number of bugs or vulnerabilities (including the OWASP top 10) in any web application regardless of the technologies used in it or the cloud servers that it runs on.


This course is highly practical but doesn't neglect the theory, we'll start with basics to teach you how websites work, the technologies used and how these technologies work together to produce these nice and functional platforms that we use everyday. Then we'll start hacking and bug hunting straight away. You'll learn everything by example, by discovering security bugs and vulnerabilities, no boring dry lectures.


The course is divided into a number of sections, each aims to teach you a common security bug or vulnerability from the OWASP top 10 most common security threats. Each section takes you through a number of hands-on examples to teach you the cause of the security bug or vulnerability and how to discover it in a number of scenarios, from simple to advanced. You'll also learn advanced techniques to bypass filters and security measures. As we do this I will also introduce you to different hacking and security concepts, tools and techniques. Everything will be taught through examples and hands-on practicals, there will be no useless or boring lectures!


At the end of the course I will take you through a two hour pentest or bug hunt to show you how to combine the knowledge that you acquired and employ it in a real-life scenario to discover bugs and vulnerabilities in a real website! I will show you how I approach a target, analyse it, and take it apart to discover bugs and vulnerabilities in features that most would think are secure!


As mentioned you'll learn much more than just how to discover security bugs in this course, but here's a list of the main security bugs and vulnerabilities that will be covered in the course:


  • Information Disclosure.

  • IDOR (Insecure Direct Object Reference).

  • Broken Access Control .

    • Directory / Path Traversal.

    • Cookie Manipulation.

    • CSRF (Client-Side Request Forgery).

    • OAUTH 2.0.

  • Injection Vulnerabilities.

    • Command Injection.

    • Blind Command Injection.

    • HTML Injection.

    • XSS (Cross-Site Scripting).

    • Reflected, Stored & DOM Based XSS.

    • Bypassing Security Filters.

    • Bypassing CSP (Content Security Policy).

    • SQL Injection.

    • Blind SQLi.

    • Time-based Blind SQLi.

  • SSRRF (Server-Side Request Forgery).

  • Blind SSRF.

  • XXE (XML External Entity) Injection.


Topics:

  • Information gathering.

  • End point discovery.

  • HTTP Headers.

  • HTTP status codes.

  • HTTP methods.

  • Input parameters.

  • Cookies.

  • HTML basics for bug hunting.

  • Javascript basics for bug hunting.

  • XML basics for bug hunting.

  • Filtering methods.

  • Bypassing blacklists & whitelists.

  • Bug hunting and research.

  • Hidden paths discovery.

  • Code analyses .


You'll use the following tools to achieve the above:

  • Ferox Buster .

  • WSL .

  • Dev tools.

  • Burp Suite:

    • Basics.

    • Burp Proxy.

    • Intruder (Simple & Cluster-bomb).

    • Repeater.

    • Collaborator.


With this course you'll get 24/7 support, so if you have any questions you can post them in the Q&A section and we'll respond to you within 15 hours.


Checkout the curriculum and the course teaser for more info!

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Instructor Details

Zaid Sabih

My name is Zaid Al-Quraishi, I am a professional ethical hacker, computer scientist, and the founder and CEO of zSecurity & Bug-Bounty. I am passionate about utilising my skills to improve the security of organisations and individuals by identifying and resolving vulnerabilities in their systems.

I have in-depth knowledge and experience in the fields of ethical hacking & cyber security, and I have helped over 1 million students worldwide on multiple teaching platforms to gain a better understanding of the subject.

My companies, zSecurity & Bug-Bounty, specialise in providing ethical hacking services and managed bug-bounty programs to help organisations identify and remediate vulnerabilities in their systems.


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Reviews

4.6

3,856 ratings on Udemy

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By Ariel on 7/12/2026

the apps that the lecture is reffering to are a bit diffrent so it is a little hard to follow this

By Elizabeth Saragih on 5/14/2026

This course is really great if you're a beginner, but I kind of hope the lecture would focus more on the mindset. For example, how to understand a site's architecture fast just by seeing the html received by the client. Which I think is really important for actual bug hunting as many modern websites would be a single page application, and some won't even let you use their site properly on burp suite chromium. I wish the scenario used is more "realistic".

By Nabi Kemmad on 1/29/2026

I have learned so much just by taking the course one step at a time and not forcing myself to start running before i have learned to walk.I basically took my time and whenever i had the time to do a section i commited myself to that section trying to understand the logic behind the explanation of Zaid and the application.It is a course i will take again to learn again what i have missed.The course is very good for starters and i would recommend it to everyone who is interested in bug bounties and into websecurity.It was really fun to learn and see the process.Thank you Zaid and Zsecurity ofcourse.

By Shaurya Singh on 1/25/2026

yes the course is really good as well a the way of teaching by zaid sir is also very good.....currently completed the 1st section by now and excited for more

By Prince Pal on 12/31/2025

i have learned so much form the course i didn't expect from this course if you are biggner in the VAPT fild then definitely you should watch this course. thank you so much zaid sir.

By Arunkumar L on 12/7/2025

I’ve completed the course “Learn how to discover bugs/vulnerabilities like experts | OWASP Top 10 + more”. The material provided a solid foundation for understanding modern web application security, covering real-world vulnerabilities, structured testing approaches, and practical demonstrations. The course does a great job of breaking down complex concepts so they are approachable for learners without prior experience, while still offering valuable depth for more advanced practitioners. Overall, a well-structured and informative learning experience.

By Ashish Jamadar on 11/26/2025

This is the best practical course designed to take you from a complete beginner to an advanced level .The content is hosted on a highly reliable and user friendly platform ensuring a smooth and effective learning experience

By Tapiwa on 10/28/2025

Will advice every one to visit this amazing course, easy to understand, hands on for sure. l guess l can now call myself a pentester or bug hunter. Looking forward to purchase more course.

By Cristiano De Simone on 8/23/2023

This has been a very enjoyable course, full of valuable information, all topics are well explained and I think it is a great starting point for beginners like me. Thanks Zaid!

By Daniel T Knotts on 12/27/2022

Very well taught. The examples and exercises were easy to follow and understand. This was my first full course on Bug Bounty so there were a lot of new terms and new procedures but the instructor made it very easy to follow along. I would definitely recommend to anyone just starting.

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Overall Score : 92 / 100