Is CVE-2020-3864 in the CISA KEV catalog?

No. CVE-2020-3864 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-3864?

CVE-2020-3864 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2020-3864?

CVE-2020-3864 has an EPSS score of 0.40% (32th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-3864?

Upgrade webkit2gtk on debian 11 to 2.26.4-1 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2020-3864

HIGH

7.8

CVSS v3

NVD

Description

A logic issue was addressed with improved validation. This issue is fixed in iCloud for Windows 7.17, iTunes 12.10.4 for Windows, iCloud for Windows 10.9.2, tvOS 13.3.1, Safari 13.0.5, iOS 13.3.1 and iPadOS 13.3.1. A DOM object context may not have had a unique security origin.

CWE-346

How to fix

Remediation Available

webkit2gtkDebian

Fixed in:2.26.4-1CVE-2020-3864

libjavascriptcoregtk-4.0-18Ubuntu

Fixed in:2.26.4-0ubuntu0.18.04.1USN-4281-1

libwebkit2gtk-4.0-37Ubuntu

Fixed in:2.26.4-0ubuntu0.18.04.1USN-4281-1

webkit2gtkUbuntu

Fixed in:2.26.4-0ubuntu0.18.04.1USN-4281-1

SafariWindows application

Affected:13.0.5Fixed in:13.0.5Apple Inc.

iCloud (Legacy)Windows application

Affected:7.17Fixed in:7.17Apple Inc.

Affected:10.0 10.9.2Fixed in:10.9.2Apple Inc.

iTunesWindows application

Affected:12.10.4Fixed in:12.10.4Apple Inc.

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.40%probability of exploitation in 30 days

32ndpercentile

Low risk: more likely to be exploited than 32% of all known CVEs.

References

Vendor Advisory6

Related Vulnerabilities

Other CWE-346 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-1185	High	7.2	82%	-	Fix
CVE-2025-34291	High	8.8	79%	KEV	-
CVE-2020-16952	High	8.6	71%	-	-
CVE-2023-29711	Critical	9.8	70%	-	-
CVE-2015-4495	High	8.8	70%	KEV	Fix
CVE-2024-23898	High	8.8	67%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.