Created
August 11, 2022 13:59
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Prevent XSS in React via dangerouslySetInnerHTML
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| /* | |
| Exampmes: | |
| // 1 | |
| const markup = `<p>Hola <img src='none.png' onerror='alert("Rainbow mode FTW!")'> Sharon</p>` | |
| <DangerousHtml innerHTML={markup} /> // <p>Hola <img src='none.png'> Sharon</p> | |
| // 2 | |
| <DangerousHtml | |
| content={`<p> | |
| Hi | |
| <script src="https://example.com/malicious-tracking"></script> | |
| Fiona, here is the link to enter your bank details: | |
| <iframe src="https://example.com/defo-not-the-actual-bank"></iframe> | |
| </p>`} | |
| /> | |
| // Notes | |
| * Remember to include or install https://github.com/cure53/DOMPurify | |
| */ | |
| import React from 'react' | |
| import DOMPurify from 'dompurify' | |
| const sanitize = dirty => DOMPurify.sanitize(dirty) | |
| const DangerousHtml = ({ innerHTML, tag }) => { | |
| const clean = sanitize(innerHTML) | |
| if (typeof Tag === 'undefined') { | |
| return <div dangerouslySetInnerHTML={{ __html: clean }} /> | |
| } | |
| return <tag dangerouslySetInnerHTML={{ __html: clean }} /> | |
| } | |
| export default DangerousHtml | |
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