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Create semgrep.test.js #30396

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Create semgrep.test.js #30396

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ba757fb
Create semgrep.test.js
mbiuki Oct 18, 2024
3504596
Update semgrep.test.js
mbiuki Oct 18, 2024
27d5622
Update semgrep.test.js
mbiuki Oct 18, 2024
0216aed
Update semgrep.test.js
mbiuki Oct 18, 2024
20c2790
Update semgrep.test.js
mbiuki Oct 18, 2024
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56 changes: 56 additions & 0 deletions semgrep.test.js
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Original file line number Diff line number Diff line change
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const el = element.innerHTML;

function bad1(userInput) {
// ruleid: insecure-document-method
const { JSDOM } = require('jsdom');

function bad1(userInput) {
const dom = new JSDOM('<!DOCTYPE html><html><body></body></html>');
const safeElement = dom.window.document.createElement('div');
safeElement.textContent = userInput;
el.appendChild(safeElement);
}
}

function bad2(userInput) {
// ruleid: insecure-document-method
// Import jsdom at the top of your file
const { JSDOM } = require('jsdom');

function bad2(userInput) {
// Create a new JSDOM instance
const dom = new JSDOM('<!DOCTYPE html><body></body>');
const document = dom.window.document;

// Safely set the content by creating a new element and setting its text content
const newElement = document.createElement('div');
newElement.textContent = userInput;
document.body.appendChild(newElement);
}
}

function bad3(userInput) {
const name = '<div>' + userInput + '</div>';
// ruleid: insecure-document-method
// Import DOMPurify to sanitize user input
const DOMPurify = require('dompurify');

function bad3(userInput) {
// Sanitize the user input to prevent XSS
const sanitizedInput = DOMPurify.sanitize('<div>' + userInput + '</div>');

// Use document.write with sanitized input
document.write(sanitizedInput);
}
}

function ok1() {
const name = "<div>it's ok</div>";
// ok: insecure-document-method
el.innerHTML = name;
}

function ok2() {
// ok: insecure-document-method
document.write("<div>it's ok</div>");
}