CVE-2021-30975

Name: CVE-2021-30975
Creator: NVD / NIST
Published: 2021-08-24T19:15:23.167+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 1.80%

Last modified Jun 17, 2026

CVE-2021-30975 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. This issue was addressed by disabling execution of JavaScript when viewing a scripting dictionary. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. EPSS estimates a 1.80% chance of exploitation in the next 30 days.

Description

This issue was addressed by disabling execution of JavaScript when viewing a scripting dictionary. This issue is fixed in macOS Monterey 12.1, Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. A malicious OSAX scripting addition may bypass Gatekeeper checks and circumvent sandbox restrictions.

Metrics

CVSS 3.1

8.6/10

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

EPSS Probability

1.80%

75.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Apple	Mac Os X	>= 10.15, < 10.15.7
Apple	Mac Os X	10.15.7
Apple	Macos	>= 11.0, < 11.6.2
Apple	Macos	>= 12.0, < 12.1

References

Timeline

Published: Aug 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-30975?

How severe is CVE-2021-30975?

CVE-2021-30975 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 1.80% probability of exploitation in the next 30 days.

How do I fix CVE-2021-30975?

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-2021-30975?

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

Scan your code now

Source: NVD / NIST