Turnstile Shadow DOM Bypass

Discovery

The Cloudflare Turnstile widget on accounts.x.ai uses shadow DOM to encapsulate the challenge iframe. The standard approach of injecting the token into cf-turnstile-response hidden inputs often fails because the React SPA reads the token from the widget's callback, not from the DOM.

The Bypass

The DrissionPage-based approach (from ReinerBRO/grok-register) directly accesses the shadow root of the Turnstile widget container and clicks the challenge button inside the iframe. This triggers the Turnstile challenge, which is auto-solved because the browser's MouseEvent.screenX/screenY are patched to realistic values.

Code Pattern

# Find the cf-turnstile-response input
challengeSolution = page.ele("@name=cf-turnstile-response")
# Get its parent (the widget container with shadow DOM)
challengeWrapper = challengeSolution.parent()
# Access the shadow root to get the iframe
challengeIframe = challengeWrapper.shadow_root.ele("tag:iframe")
# Inject JavaScript into the iframe to patch MouseEvent
challengeIframe.run_js("""
    window.dtp = 1
    function getRandomInt(min, max) {
        return Math.floor(Math.random() * (max - min + 1)) + min;
    }
    let screenX = getRandomInt(800, 1200);
    let screenY = getRandomInt(400, 600);
    Object.defineProperty(MouseEvent.prototype, 'screenX', { value: screenX });
    Object.defineProperty(MouseEvent.prototype, 'screenY', { value: screenY });
""")
# Access the iframe's body shadow root to find the challenge button
challengeIframeBody = challengeIframe.ele("tag:body").shadow_root
challengeButton = challengeIframeBody.ele("tag:input")
# Click the button to trigger the challenge
challengeButton.click()

Why It Works

Cloudflare Turnstile uses behavioral detection to determine if the visitor is human. One signal is the screenX/screenY coordinates of mouse events. In headless/automated browsers, these are often 0 or unrealistic values. By patching MouseEvent.prototype.screenX/screenY to random values between 800-1200 (x) and 400-600 (y), the behavioral detection passes, and the Turnstile auto-solves without showing a challenge.

When to Use

When 2captcha fails to solve the profile-page Turnstile (sitekey 0x4AAAAAAAhr9JGVDZbrZOo0)
When you need faster account creation without external captcha services
The code-page Turnstile (sitekey 0x4AAAAAAADnQ4F4U8W2nQyH) is also bypassed by this method

Requirements

DrissionPage library (pip install DrissionPage==[REDACTED-IP])
Chrome/Chromium browser
The Turnstile Patcher Chrome extension (in turnstilePatch/ directory of the repo) — this patches MouseEvent at the content script level for the initial page load

Limitations

This only works with DrissionPage (not Playwright) because DrissionPage provides shadow_root access
The Chrome extension must be loaded at browser startup
Some Turnstile challenges may still require manual solving if the behavioral detection is more sophisticated

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