A flaw was found in moodle before versions 3.5.1, 3.4.4, 3.3.7, 3.1.13. It was possible for the core_course_get_categories web service to return hidden categories, which should be omitted when fetching course categories.Referenceshttps://moodle.org/mod/forum/discuss.php?d=373370https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10890http://www.securityfocus.com/bid/104738
