CVE-2019-8503: Apple iCloud

High severity, CVSS 8.8. EPSS: 1.8% chance of exploitation in the next 30 days.

A logic issue was addressed with improved validation. This issue is fixed in iOS 12.2, tvOS 12.2, Safari 12.1, iTunes 12.9.4 for Windows, iCloud for Windows 7.11. A malicious website may be able to execute scripts in the context of another website.

Affected products

• Apple iCloud: before 7.11 (fixed in 7.11)
• Apple iPhone OS: before 12.2 (fixed in 12.2)
• Apple iTunes: before 12.9.4 (fixed in 12.9.4)
• Apple Safari: before 12.1 (fixed in 12.1)
• Apple tvOS: before 12.2 (fixed in 12.2)

Published 2019-12-18. Last modified 2026-06-17.