--- title: Breaking Down DOM-based XSS: A Practical Exploration description: This post explores DOM-based XSS and explains how to hunt for it through source code analysis of client-side JavaScript. It discusses a vulnerability that... canonical: https://daily.dev/posts/breaking-down-dom-based-xss-a-practical-exploration-289xnliur twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Breaking Down DOM-based XSS: A Practical Exploration | daily.dev og:description: This post explores DOM-based XSS and explains how to hunt for it through source code analysis of client-side JavaScript. It discusses a vulnerability that... og:url: https://daily.dev/posts/breaking-down-dom-based-xss-a-practical-exploration-289xnliur og:image: https://api.daily.dev/og/posts/289XNLiUR.png og:image:alt: Breaking Down DOM-based XSS: A Practical Exploration og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Breaking Down DOM-based XSS: A Practical Exploration **[Medium](https://daily.dev/sources/medium_js)** · 2 min read · 9 upvotes · 0 comments ## Summary This post explores DOM-based XSS and explains how to hunt for it through source code analysis of client-side JavaScript. It discusses a vulnerability that allows for DOM-based XSS attacks by mishandling user inputs retrieved from URL parameters. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#security](https://daily.dev/tags/security), [#webdev](https://daily.dev/tags/webdev), [#javascript](https://daily.dev/tags/javascript), [#vulnerability](https://daily.dev/tags/vulnerability) [View this post on daily.dev](https://daily.dev/posts/breaking-down-dom-based-xss-a-practical-exploration-289xnliur) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Breaking Down DOM-based XSS: A Practical Exploration","url":"https://daily.dev/posts/breaking-down-dom-based-xss-a-practical-exploration-289xnliur","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/breaking-down-dom-based-xss-a-practical-exploration-289xnliur"},"datePublished":"2024-05-12T11:06:43.843Z","dateModified":"2024-05-12T11:06:41.949Z","description":"This post explores DOM-based XSS and explains how to hunt for it through source code analysis of client-side JavaScript. It discusses a vulnerability that...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/42430168c06916b39472af9940954179?_a=AQAEuiZ","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/42430168c06916b39472af9940954179?_a=AQAEuiZ","isAccessibleForFree":true,"articleSection":"Medium","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Medium","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/medium","url":"https://daily.dev/sources/medium_js"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/breaking-down-dom-based-xss-a-practical-exploration-289xnliur","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":9},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"security,webdev,javascript,vulnerability","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Medium","item":"https://daily.dev/sources/medium_js"},{"@type":"ListItem","position":3,"name":"Breaking Down DOM-based XSS: A Practical Exploration"}]} ```