🧠 What is XSS (Cross-Site Scripting)?

XSS (Cross-Site Scripting) is a type of security vulnerability that allows an attacker to inject malicious code (usually JavaScript) into a website or web application. This code then runs in the browser of other users who visit the site.

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🧨 Why is it dangerous?

Because it lets attackers:

• Steal cookies, session tokens, or personal data
• Trick users into clicking fake buttons or links (phishing)
• Deface the website or redirect users elsewhere
• Hijack user accounts or perform actions on their behalf

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🔍 How does it happen?

It usually happens when a website:

1. Takes user input (like in a search box or comment field)

2. Displays it back on the page without properly cleaning it

3. So an attacker can input something like:

   <script>alert('XSS')</script>

and get xss triggered!

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🧪 XSS LAB – Complete XSS Vulnerability Training Ground

This project is a hands-on web security lab designed to help learners understand and exploit the three major types of Cross-Site Scripting (XSS) vulnerabilities: 🔁 Reflected, 🗃️ Stored, and 🧠 DOM-Based XSS.

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🚀 Project Structure TRY NOW!

The lab is divided into diffrent escalating levels of difficulty:

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◾ Lab 1 – Beginner Level: Basic Injection

Focus: Introduces how unfiltered user input is executed as code.

• Users can enter simple scripts like:

  <script>alert(87)</script>

• Demonstrates:

  • Basic reflected XSS (via query parameters or form input)
  • Stored XSS (through input saved and re-displayed)
  • A basic example of DOM-based XSS

• Suitable for beginners to understand how careless input handling results in direct script execution.

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◾ Lab 2 – Intermediate Level: Context Breakout

Focus: Teaches bypassing more complex filters and escaping HTML contexts.

• Requires crafted payloads such as:

  "><script>alert(87)</script>

• Demonstrates:

  • How XSS works when injection occurs inside HTML attributes, tags, or JS contexts
  • DOM manipulation vulnerabilities where user input is processed via JavaScript (e.g., location.hash, innerHTML, document.write)

• Helps learners practice breaking out of quotes, attributes, or tags — simulating real-world attack scenarios.

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◾ Lab 3 – Coming Soon

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🎯 Learning Objectives

By completing these labs, users will:

• Understand the differences between Reflected, Stored, and DOM-based XSS
• Learn to identify vulnerable input/output handling
• Gain hands-on experience with payload crafting and context-based escaping
• Improve awareness of secure coding best practices

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⚠️ Disclaimer

This lab is intended strictly for educational purposes. Do not attempt these techniques on any live websites or systems without explicit permission.

🤝 Want to Contribute?

We’re building this XSS Lab for learners, web security explorers, and curious minds — and you can help make it even better!

🔧 How You Can Contribute:

• Add new XSS levels or challenges (Reflected / Stored / DOM-based)
• Suggest new payloads or bypass techniques
• Fix bugs or write better explanations

🛠️ Getting Started:

1. Fork the project on GitHub
2. Make your changes
3. Submit a Pull Request
4. We’ll review and merge!

💡 No idea is too small. Whether it’s a typo fix or a new lab — every contribution counts.

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👾 Built by web security explorers, For web security explorers

This project was crafted with ⚔️ passion and 💻 precision by:

• Unass
• Zaid

We built this lab to help others learn, break, and secure — because the best way to defend the web is to understand how it’s broken.

🙏 Special thanks to the community of web security explorers and learners who inspire us to push boundaries, ask better questions, and share knowledge freely.

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This project is licensed under the — feel free to use, modify, and share with proper attribution.