A flaw was found in moodle before versions 3.7.1, 3.6.5, 3.5.7. Teachers in a quiz group could modify group overrides for other groups in the same quiz.Referenceshttp://www.securityfocus.com/bid/109178https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-10188https://moodle.org/mod/forum/discuss.php?d=388569
