CVE-2020-9885 Auth bypass in iOS
A removed user could rejoin an iMessage group due to insufficient verification, allowing unauthorized access to group communications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-9885?
CVE-2020-9885 is a medium-severity authentication bypass vulnerability in Apple Ipados, published on 16 Oct 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
An issue existed in the handling of iMessage tapbacks. The issue was resolved with additional verification. This issue is fixed in iOS 13.6 and iPadOS 13.6, macOS Catalina 10.15.6, tvOS 13.4.8, watchOS 6.2.8. A user that is removed from an iMessage group could rejoin the group.
Weakness: CWE-345
Which versions are affected by CVE-2020-9885?
It affects 5 products.
Products include Apple Ipados, Apple Iphone Os, Apple Mac Os X, Apple Tvos, Apple Watchos.
How do I fix CVE-2020-9885?
No fix has been published for CVE-2020-9885 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2020-9885 being exploited?
There is no known exploitation of CVE-2020-9885 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
- CVE-2025-24201 Apple Multiple Products WebKit Out-of-Bounds Write
- CVE-2025-24085 Apple Multiple Products Use-After-Free
- CVE-2025-31200 Apple Multiple Products Memory Corruption
- CVE-2025-31201 Apple Multiple Products Arbitrary Read and Write
Sources
Also known as GHSA-mwr9-mrq7-g9xf.