CVE-2020-9942

Name: CVE-2020-9942
Creator: NVD / NIST
Published: 2020-12-08T20:15:16.23+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 1.16%

Last modified Jun 17, 2026

CVE-2020-9942 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. An inconsistent user interface issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1, Safari 13.1.2. EPSS estimates a 1.16% chance of exploitation in the next 30 days.

Description

An inconsistent user interface issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1, Safari 13.1.2. Visiting a malicious website may lead to address bar spoofing.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

1.16%

63.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1021

Affected Software

Vendor	Product	Versions
Apple	Safari	< 13.1.2
Apple	Mac Os X	< 11.0.1

References

http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT211292Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT211931Release Notes, Vendor Advisory
http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT211292Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT211931Release Notes, Vendor Advisory

Timeline

Published: Dec 8, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9942?

How severe is CVE-2020-9942?

CVE-2020-9942 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 1.16% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9942?

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-2020-9942?

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

Scan your code now

Source: NVD / NIST