CVE-2020-9952: Apple iCloud

High severity, CVSS 7.1. EPSS: 1.5% chance of exploitation in the next 30 days.

An input validation issue was addressed with improved input validation. This issue is fixed in iOS 14.0 and iPadOS 14.0, tvOS 14.0, watchOS 7.0, Safari 14.0, iCloud for Windows 11.4, iCloud for Windows 7.21. Processing maliciously crafted web content may lead to a cross site scripting attack.

Affected products

• Apple iCloud: before 7.21 (fixed in 7.21); from 11.0, before 11.4 (fixed in 11.4)
• Apple iPadOS: before 14.0 (fixed in 14.0)
• Apple iPhone OS: before 14.0 (fixed in 14.0)
• Apple Safari: before 14.0 (fixed in 14.0)
• Apple tvOS: before 14.0 (fixed in 14.0)
• Apple watchOS: before 7.0 (fixed in 7.0)
• Webkit Webkitgtk+: up to and including 2.30.3

Published 2020-10-16. Last modified 2026-06-17.