Unspecified vulnerability in the XML Developer's Kit for C component in Oracle Database Server 11.2.0.3, 11.2.0.4, 12.1.0.1, and 12.1.0.2 allows remote authenticated users to affect confidentiality via unknown vectors.  NOTE: the previous information is from the January 2015 CPU. Oracle has not commented on the original researcher's claim that this is an XML external entity (XXE) vulnerability in the XML parser, which allows attackers to conduct internal port scanning, perform SSRF attacks, or cause a denial of service via a crafted (1) http: or (2) ftp: URI.