The vulnerability was found Moodle which exists because the application allows a user to control path of the older to create in TinyMCE loaders. A remote user can send a specially crafted HTTP request and create arbitrary folders on the system.
git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-77718
bugzilla.redhat.com/show_bug.cgi?id=2188605
lists.fedoraproject.org/archives/list/[email protected]/message/54TM5H5PDUDYXOQ7X7PPYWP4AJDAE73I/
lists.fedoraproject.org/archives/list/[email protected]/message/MZBWRVUJF7HI53XCJPJ3YJZPOV5HBRUY/
lists.fedoraproject.org/archives/list/[email protected]/message/PBFSXRYLT4ICKJVQSRBAOUDMDRVSVBLS/
moodle.org/mod/forum/discuss.php?d=446285