Multiple cross-site scripting (XSS) vulnerabilities in PHP-Post (PHPp) 1.0 allow remote attackers to inject arbitrary web script or HTML via (1) the subject in a post, or the user parameter to (2) profile.php and (3) mail.php.
http://www.vupen.com/english/advisories/2005/2533
http://www.securityfocus.com/bid/15532