Drupal 8.x < 8.5.6 Symfony Risky HTTP Header Restriction Bypass Vulnerability (SA-CORE-2018-005)
Medium Nessus Plugin ID 111599
SynopsisA PHP application running on the remote web server is affected by a restriction bypass vulnerability.
DescriptionAccording to its self-reported version, the instance of Drupal running on the remote web server is 8.x prior to 8.5.6. It is, therefore, affected by a restriction bypass vulnerability in the embedded Symfony library.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
SolutionUpgrade to Drupal version 8.5.6 or later.