Wiki comments required additional sanitizing and access restrictions to prevent a stored XSS risk and potential IDOR risk.
https://moodle.org/mod/forum/discuss.php?d=451585
https://bugzilla.redhat.com/show_bug.cgi?id=2243443
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-79509