Mar 6, 14:39 PST
Resolved – Pantheon has released WordPress 4.7.3, a security release of WordPress to fix multiple security vulnerabilities. Pantheon has made the update 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.
 – https://wordpress.org/news/2017/03/wordpress-4-7-3-security-and-maintenance-release/
 – https://pantheon.io/docs/upstream-updates/