Medium severityJavaScript / TypeScriptCross-Site Scripting (XSS)MEDIUM confidence
DOM XSS Innerhtml Sink
Assigning a dynamic value to innerHTML/outerHTML (or document.write) can introduce DOM-based XSS.
Standards mapping
- OWASP Top 10
- A03:2021 - Injection
- OWASP ASVS
- V5.3.3 (L1)
Vulnerable vs. safe
Flagged by this check
el.innerHTML = userInput;Passes - the safe pattern
el.textContent = userInput;Why it matters & how to fix it
Assigning a dynamic value to innerHTML/outerHTML (or document.write) can introduce DOM-based XSS. Use textContent, or sanitize with DOMPurify before injecting HTML.
References
Rule ID integsec-js-dom-xss-innerhtml-sink - engine: Opengrep - license: MIT - Copyright (c) IntegSec Inc.
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