CVE-2021-1879: Apple iOS, iPadOS, and watchOS Cross-Site Scripting (XSS) Vulnerability
First published: Fri Mar 26 2021(Updated: )
Apple iOS, iPadOS, and watchOS WebKit contain an unspecified vulnerability that allows for universal cross-site scripting (XSS) when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.
Credit: Clement Lecigne Google Threat Analysis GroupBilly Leonard Google Threat Analysis Group product-security@apple.com Clement Lecigne Google Threat Analysis GroupBilly Leonard Google Threat Analysis GroupClement Lecigne Google Threat Analysis GroupBilly Leonard Google Threat Analysis Group product-security@apple.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Apple watchOS | <7.3.3 | 7.3.3 |
| Apple iPadOS | <14.4.2 | |
| Apple iPhone OS | <12.5.2 | |
| Apple iPhone OS | >=13.0<14.4.2 | |
| Apple watchOS | <7.3.3 | |
| Apple iOS | <12.5.2 | 12.5.2 |
| Apple iOS | <14.4.2 | 14.4.2 |
| Apple iPadOS | <14.4.2 | 14.4.2 |
| <14.4.2 | ||
| <12.5.2 | ||
| >=13.0<14.4.2 | ||
| <7.3.3 | ||
| Apple iOS, iPadOS, and watchOS |
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Reference Links
- https://support.apple.com/en-us/HT212258 (Advisory)
- https://support.apple.com/en-us/HT212256 (Advisory)
- https://support.apple.com/en-us/HT212257 (Advisory)
- https://www.bleepingcomputer.com/news/security/russian-apt29-hackers-use-ios-chrome-exploits-created-by-spyware-vendors/
- https://nvd.nist.gov/vuln/detail/CVE-2021-1879
Frequently Asked Questions
What is the severity of CVE-2021-1879?
The severity of CVE-2021-1879 is high.
How does CVE-2021-1879 affect Apple devices?
CVE-2021-1879 affects Apple iOS, iPadOS, and watchOS devices.
What is the recommended remedy for CVE-2021-1879?
The recommended remedy for CVE-2021-1879 is to update to Apple iOS, iPadOS, and watchOS versions 14.4.2, 12.5.2, or 7.3.3.
What is cross-site scripting (XSS) vulnerability?
Cross-site scripting (XSS) vulnerability is a type of security vulnerability that allows attackers to inject malicious scripts into web pages viewed by other users.
Where can I find more information about CVE-2021-1879?
You can find more information about CVE-2021-1879 on the Apple support website.
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