An issue was discovered in certain Apple products. Safari before 10.0.1 is affected. iCloud before 6.0.1 is affected. iTunes before 12.5.2 is affected. tvOS before 10.0.1 is affected. The issue involves the "WebKit" component. It allows remote attackers to obtain sensitive information via a crafted web site.
https://support.apple.com/HT207274
https://support.apple.com/HT207273
https://support.apple.com/HT207272
https://support.apple.com/HT207270