OTCMS v3.85 allows arbitrary PHP Code Execution because admin/sysCheckFile_deal.php blocks "into outfile" in a SELECT statement, but does not block the "into/**/outfile" manipulation. Therefore, the attacker can create a .php file.
OTCMS v3.85 has CSRF in the admin/member_deal.php Admin Panel page, leading to creation of a new management group account, as demonstrated by superadmin.