You can find a list of new functionalities and fixes for version 4.2.13 and for version v4.4.8.
If you have any improvements you want to contribute back, the best is to use git to get a local copy of the source code from the GeoNetwork GitHub repository, apply the fix and put out a pull request so your improvements can be integrated quickly. Otherwise you can also create new tickets in the GitHub issue tracker.
Thanks and congratulations to all the community members and developers that have been putting effort and energy in these releases and the documentation update.
aside: This vulnerability occurred in the GeoTools which was assigned the CVE-2025-30220 record number, affected software such as GeoNetwork do not get a distinct “common vulnerability and exploit” record. While I have not experienced this personally different national registrars may end up merging reports, I am curious what will happen if anyone wishes to report back on their experience.