Drupal 8.4.x < 8.4.6 RCE

The version of Drupal installed on the remote server is 8.4.x prior to 8.4.6, and is affected by a flaw in the ‘preHandle()’ function in ‘core/lib/Drupal/Core/DrupalKernel.php’ that is triggered as certain parameter keys within HTTP requests are not properly sanitized. This may allow a remote attacker to execute arbitrary code. This issue may be exploited using multiple unspecified attack vectors.