CVE-2021-30943 Business logic in watchOS

What is CVE-2021-30943?

CVE-2021-30943 is a medium-severity vulnerability in Apple Ipados, published on 24 Aug 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

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.

Weakness: CWE-613

Which versions are affected by CVE-2021-30943?

It affects 4 products.

Products include Apple Ipados, Apple Iphone Os, Apple Macos, Apple Watchos.

How do I fix CVE-2021-30943?

No fix has been published for CVE-2021-30943 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-30943 being exploited?

There is no known exploitation of CVE-2021-30943 in the wild and no public exploit code.

Other vulnerabilities in Apple Ipados

• CVE-2025-43300 Apple iOS, iPadOS, and macOS Out-of-Bounds Write Exploited Critical 10.0
• CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write Exploited Critical 10.0
• CVE-2025-24085 Apple Multiple Products Use-After-Free Exploited Critical 10.0
• CVE-2025-31200 Apple Multiple Products Memory Corruption Exploited Critical 9.8
• CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write Exploited Critical 9.8

All Apple Ipados vulnerabilities

Sources

• CVE record
• NVD
• OSV
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