CVE-2021-30897 Information disclosure in macOS
A malicious website can exfiltrate cross-origin data due to a flaw in the resource timing API specification implementation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2021-30897?
CVE-2021-30897 is a medium-severity vulnerability in Apple Ipados, published on 24 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An issue existed in the specification for the resource timing API. The specification was updated and the updated specification was implemented. This issue is fixed in macOS Monterey 12.0.1. A malicious website may exfiltrate data cross-origin.
Which versions are affected by CVE-2021-30897?
It affects 4 products.
Products include Apple Ipados, Apple Iphone Os, Apple Macos, Apple Tvos.
How do I fix CVE-2021-30897?
Apply the vendor's patch.
Is CVE-2021-30897 being exploited?
There is no known exploitation of CVE-2021-30897 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 UBUNTU-CVE-2021-30897.