The Fifth bug-fix release for Hibernate ORM 5.2 has just been published. It is tagged at https://github.com/hibernate/hibernate-orm/releases/tag/5.2.5
The complete list of changes can be found here (or here for people without a Hibernate Jira account).
For information on consuming the release via your favorite dependency-management-capable build tool, see https://hibernate.org/orm/downloads/
The release bundles can be obtained from SourceForge or BinTray.