This version addresses several security vulnerabilities (some of which were critical). Many of these vulnerabilities could only be exploited with a valid login. However, there was also an issue in version 5 where attackers could delete data in the Documents & Files module if that data was publicly visible.
For this reason, we strongly recommend updating to version 5.0.7!
You can find more information here: https://github.com/Admidio/admidio/security
We recommend you to read our announcements for version 5 if you have not done before.
A full list of all new features and bugfixes can be found in our issue tracker for version 5.0 and 5.0.6!
Full Changelog: https://github.com/Admidio/admidio/compare/v5.0.5..v5.0.7
If you are new to Admidio and want to install it on your webpage than the following wikipage could help: Install Admidio
The following wiki pages maybe interesting on an Update: Update Admidio