> For the complete documentation index, see [llms.txt](https://books.spartan-cybersec.com/web/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://books.spartan-cybersec.com/web/cross-site-scripting/lab-3-dom-xss-in-document.write-sink-using-source-location.search.md).

# Lab 3: DOM XSS in document.write sink using source location.search

https\://portswigger.net/web-security/cross-site-scripting/dom-based/lab-document-write-sink

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