The document contains two lines of code that could potentially execute malicious scripts or code. The first line contains a script tag with an alert popup. The second line contains an img tag with an invalid src and an onerror event handler that also triggers an alert. In summary, the document contains code that may compromise security through unauthorized popups or script execution.

1. <script>alert(1)</script>
<img src=x onerror=alert(1)>