The latest version is 2.8.3 from October 2023. See NewFeatures283 for a full list of improvements compared to the previous version. All users should upgrade. A Java 8 JVM and a Servlet 3.1 container is required.

If you want to use the as-yet-unreleased features mentioned in NewFeaturesTrunk, you'll have to download the source code and build the war file yourself.