If you haven't updated Terminus recently, checkout the Terminus Changelog to see what's new and update to the current release
Pantheon release notes
Terminus 1.5
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PHP Upgrades
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We upgraded PHP to 5.6.31 and 7.0.23. See our documentation to learn how to upgrade your PHP version. Drupal 7 sites may require action.
We improved cache clearing behavior for a large number of surrogate keys or cache tags. The fix was made internally by Pantheon and no action is required if you are already running WordPress or Drupal versions of Pantheon Advanced Page Cache. See the Pantheon Advanced Page Cache for WordPress and Drupal pages for more information.
Drupal Core Upgrades
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Drupal 8.3.7 has been pushed to all Drupal 8 site dashboards.
Documentation
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Terminus 1.4.1
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If you haven’t updated Terminus recently, checkout the Terminus Changelog to see what’s new and update to the current release
Although our analysis indicated our customers were not likely subject to this vulnerability, we applied the recommended remediation for CVE-2017-7529.
Drupal Core Upgrades
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Drupal 8.3.5 has been pushed to all Drupal Site Dashboards.