source: https://www.securityfocus.com/bid/21164/info

The application is prone to an input-validation vulnerability that allows malicious HTML and script code to be injected before it is used in dynamically generated content.

Attacker-supplied HTML and script code would execute in the context of the affected application, potentially allowing an attacker to steal cookie-based authentication credentials; other attacks are also possible.

<img src="http://www.example.com/images/jss.jpg" <script>alert(.blah.);</script> ></img>