CVE-2021-1748 Cross-site scripting in iOS and iPadOS
Attackers can execute arbitrary JavaScript code by tricking users into processing a maliciously crafted URL on Apple devices.
- 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
- None listed
What is CVE-2021-1748?
CVE-2021-1748 is a high-severity cross-site scripting vulnerability in Apple Ipados, published on 2 Apr 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
A validation issue was addressed with improved input sanitization. This issue is fixed in tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4. Processing a maliciously crafted URL may lead to arbitrary javascript code execution.
Weakness: CWE-20
Which versions are affected by CVE-2021-1748?
It affects 4 products.
Products include Apple Ipados, Apple Iphone Os, Apple Tvos, Apple Watchos.
How do I fix CVE-2021-1748?
No fix has been published for CVE-2021-1748 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-1748 being exploited?
There is no known exploitation of CVE-2021-1748 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
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-qm4j-qr33-h42h.