In this tutorial, we solve PortSwigger XSS Lab 3: DOM XSS in document.write sink using source location.search.

You will learn:

What DOM-based Cross-Site Scripting (XSS) is.

How it differs from Reflected and Stored XSS.

How document.write and location.search can create XSS vulnerabilities.

Step-by-step solution to this lab in a safe and legal environment.

This video is part of the PortSwigger Academy Labs series, designed to help you build strong skills in ethical hacking, penetration testing, and web security.

Whether you’re preparing for bug bounty hunting or learning cybersecurity basics, this lab will improve your understanding of DOM XSS attacks and how to defend against them.

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📌 Hashtags

#XSS #DOMXSS #CrossSiteScripting #WebSecurity #PortSwigger #BugBounty #EthicalHacking #CyberSecurity #PenetrationTesting #OWASP