The remote host is vulnerable to a Cross-Site Scripting (XSS) attack.
The version of WordPress installed on the remote host is vulnerable to a cross-site scripting flaw due to the way that it parses user-supplied data to the 'press-this.php' script. An attacker exploiting this flaw would need to be able to convince a WordPress user to open a malicious URI. Successful exploitation would result in attacker code being run in the browser.
Upgrade to WordPress 2.6, or later.