CVE-2018-4311: Apple iCloud

High severity, CVSS 8.1. EPSS: 2.1% chance of exploitation in the next 30 days.

The issue was addressed by removing origin information. This issue affected versions prior to iOS 12, watchOS 5, Safari 12, iTunes 12.9 for Windows, iCloud for Windows 7.7.

Affected products

• Apple iCloud: before 7.7 (fixed in 7.7)
• Apple iPhone OS: before 12.0 (fixed in 12.0)
• Apple iTunes: before 12.9 (fixed in 12.9)
• Apple Safari: before 12 (fixed in 12)
• Apple watchOS: before 5.0 (fixed in 5.0)

Published 2019-04-03. Last modified 2026-06-17.