CVE-2020-9952

Name: CVE-2020-9952
Creator: NVD / NIST
Published: 2020-10-16T17:15:17.95+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 1.48%

Last modified Jun 17, 2026

CVE-2020-9952 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. An input validation issue was addressed with improved input validation. This issue is fixed in iOS 14.0 and iPadOS 14.0, tvOS 14.0, watchOS 7.0, Safari 14.0, iCloud for Windows 11.4, iCloud for Windows 7.21. EPSS estimates a 1.48% chance of exploitation in the next 30 days.

Description

An input validation issue was addressed with improved input validation. This issue is fixed in iOS 14.0 and iPadOS 14.0, tvOS 14.0, watchOS 7.0, Safari 14.0, iCloud for Windows 11.4, iCloud for Windows 7.21. Processing maliciously crafted web content may lead to a cross site scripting attack.

Metrics

CVSS 3.1

7.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

EPSS Probability

1.48%

70.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Apple	Icloud	< 7.21
Apple	Icloud	>= 11.0, < 11.4
Apple	Safari	< 14.0
Apple	Ipados	< 14.0
Apple	Iphone Os	< 14.0
Apple	Tvos	< 14.0
Apple	Watchos	< 7.0
Webkit	Webkitgtk\+	<= 2.30.3

References

http://seclists.org/fulldisclosure/2020/Nov/18Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Nov/19Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Nov/20Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Nov/22Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/11/23/3Mailing List
https://security.gentoo.org/glsa/202012-10Third Party Advisory
https://support.apple.com/HT211843Release Notes, Vendor Advisory
https://support.apple.com/HT211844Release Notes, Vendor Advisory
https://support.apple.com/HT211845Release Notes, Vendor Advisory
https://support.apple.com/HT211846Release Notes, Vendor Advisory
https://support.apple.com/HT211847Release Notes, Vendor Advisory
https://support.apple.com/HT211850Vendor Advisory
http://seclists.org/fulldisclosure/2020/Nov/18Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Nov/19Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Nov/20Mailing List, Third Party Advisory
http://seclists.org/fulldisclosure/2020/Nov/22Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/11/23/3Mailing List
https://security.gentoo.org/glsa/202012-10Third Party Advisory
https://support.apple.com/HT211843Release Notes, Vendor Advisory
https://support.apple.com/HT211844Release Notes, Vendor Advisory
https://support.apple.com/HT211845Release Notes, Vendor Advisory
https://support.apple.com/HT211846Release Notes, Vendor Advisory
https://support.apple.com/HT211847Release Notes, Vendor Advisory
https://support.apple.com/HT211850Vendor Advisory

Timeline

Published: Oct 16, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9952?

How severe is CVE-2020-9952?

CVE-2020-9952 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 1.48% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9952?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-9952?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST