The PHP version has been automatically updated to the latest version.
A daily maintenance task, performed on schedule each night, checks for new Plesk updates and installs them using Parallels Installer. However, Installer is executed with the
--select-release-current --upgrade-all-components options. If an update for a third-party component (such as PHP) is available from the vendor's package repositories, it is installed as well.
Since Plesk 11.5, the default behavior of automatic updates is to install updates for Plesk only.
Updates for third-party components can be enabled at Tools & Settings > Update and Upgrade Settings.