test.svg

<svg xmlns="http://www.w3.org/2000/svg">
    <foreignObject width="100%" height="100%">
        <div xmlns="http://www.w3.org/1999/xhtml">
            <script>alert('Hi!')</script>
            <style>
                body {
                    color: #ffffff;
                }
            </style>
        </div>
    </foreignObject>
    <script>
        alert('Hi!')
    </script>
</svg>