Drupal 8.5.2 + 8.4.7 Security Update
Incident Report for Pantheon Operations
Resolved
Drupal.org has released version 8.5.2 and 8.4.7. This release is classified as a security release for all previous versions of Drupal.[1] Pantheon has made Drupal 8.5.2 available for one-click update in site dashboards. We urge all users to update all environments as soon as possible. Instructions for applying core updates can be found in our Support Center.[2]

[1] - https://www.drupal.org/sa-core-2018-003
[2] - https://pantheon.io/docs/upstream-updates/
Posted Apr 18, 2018 - 13:33 PDT