It was possible for some users without permission to view other users' full names to do so via the online users block in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.
{ "cpes": [ "cpe:2.3:a:moodle:moodle:*:*:*:*:*:*:*:*" ], "severity": "Medium" }