Under certain conditions SAP Gateway of ABAP Application Server (fixed in SAP_GWFND 7.5, 7.51, 7.52, 7.53; SAP_BASIS 7.5) allows an attacker to access information which would otherwise be restricted.
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=509151985
https://launchpad.support.sap.com/#/notes/2723142