Dangerous dynamic HTML insert detected.

• Rule ID: javascript_lang_dangerous_insert_html
• Languages: javascript
• Source: dangerous_insert_html.yml

Description

There are XSS vulnerabilities when dynamically inserting HTML that contains unsanitized data.

Remediations

Make sure you use HTML sanitization library before inserting html

import sanitizeHtml from 'sanitize-html';

const html = `<strong>${user.Input}</strong>`;
document.body.innerHTML = sanitizeHtml(html)

Resources

• OWASP XSS explained

Associated CWE

• CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

OWASP Top 10

• A03:2021 - Injection