Important Note: As announced before, Joomla 3.7.1 with security fix is out. You're strongly recommended to update your sites immediately.
The Joomla! Security Strike Team (JSST) has been informed of a critical security issue in the Joomla! core that you are highly recommended to update your Joomla installation after the security release of Joomla 3.7.1 on Wednesday, 17th May.