David Bennett PHP-Post (PHPp) 1.0 and earlier allows remote attackers to obtain sensitive information via a direct request for (1) footer.php, (2) template.php, or (3) lastvisit.php, which reveals the installation path in various error messages.
http://www.vupen.com/english/advisories/2006/3688
http://www.securityfocus.com/bid/20061
http://www.securityfocus.com/archive/1/446318/100/0/threaded