CVE-2021-30943: Apple iPadOS

Medium severity, CVSS 4.3. EPSS: 0.8% chance of exploitation in the next 30 days.

An issue in the handling of group membership was resolved with improved logic. This issue is fixed in iOS 15.2 and iPadOS 15.2, watchOS 8.3, macOS Monterey 12.1. A malicious user may be able to leave a messages group but continue to receive messages in that group.

Affected products

• Apple iPadOS: before 15.2 (fixed in 15.2)
• Apple iPhone OS: before 15.2 (fixed in 15.2)
• Apple macOS: from 12.0.0, before 12.1 (fixed in 12.1)
• Apple watchOS: before 8.3 (fixed in 8.3)

Published 2021-08-24. Last modified 2026-06-17.