The participants table download in Moodle always included user emails, but should have only done so when users’ emails are not hidden. Versions affected: 3.9 to 3.9.2, 3.8 to 3.8.5 and 3.7 to 3.7.8. This is fixed in moodle 3.9.3, 3.8.6, 3.7.9, and 3.10.
bugzilla.redhat.com/show_bug.cgi?id=1895439
github.com/moodle/moodle
lists.fedoraproject.org/archives/list/[email protected]/message/4NNFCHPPHRJNJROIX6SYMHOC6HMKP3GU
lists.fedoraproject.org/archives/list/[email protected]/message/B55KXBVAT45MDASJ3EK6VIGQOYGJ4NH6
moodle.org/mod/forum/discuss.php?d=413941
nvd.nist.gov/vuln/detail/CVE-2020-25703