CVE-2026-58054:MyBB 1.8.40 does not restrict which usergroup a limited Admin Control Panel user may assign when creating or editing use
MyBB 1.8.40 does not restrict which usergroup a limited Admin Control Panel user may assign when creating or editing users; the user module offers the Administrators group (gid 4) and its datahandler's verify_usergroup() unconditionally returns true. An a