It was possible for some users without permission to view other users' full names to do so via the online users block.
Created moodle tracking bugs for this issue:
Affects: epel-all [bug 1939043]
Affects: fedora-all [bug 1939047]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.