CVE-2020-9945

Name: CVE-2020-9945
Creator: NVD / NIST
Published: 2020-12-08T20:15:16.557+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 1.16%

Last modified Jun 17, 2026

CVE-2020-9945 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation. EPSS estimates a 1.16% chance of exploitation in the next 30 days.

Description

A spoofing issue existed in the handling of URLs. This issue was addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, Safari 14.0.1. 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	< 14.0.1
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/HT211931Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT211934Release Notes, Vendor Advisory
http://seclists.org/fulldisclosure/2020/Dec/32Mailing List, Third Party Advisory
https://support.apple.com/en-us/HT211931Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT211934Release Notes, Vendor Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2020-9945?

How severe is CVE-2020-9945?

CVE-2020-9945 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-2020-9945?

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-2020-9945?

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

Scan your code now

Source: NVD / NIST