Today we have released Moodle 3.9.2, 3.8.5, 3.7.8, and 3.5.14. These new minor releases are now available for download via https://download.moodle.org or Git.
The releases include bug-fixes, as well as security improvements, and we recommend that you upgrade your sites as soon as possible. Upgrading should be straightforward.
Administrators of all registered Moodle sites will receive an email with details of the security fixes and we'll publish these more widely shortly.
The release notes for each version can be found here:
Note that after the next minor release, on November 9th, support will cease for Moodle 3.7 (final supported version will be Moodle 3.7.9). On that same date, Moodle 3.8 will enter security support only. If you are on either Moodle 3.7 or 3.8, now is a good time to plan your upgrades.
Please see the releases page for more details.