CVE-2020-9942

MEDIUMNVD 4.34.3—

4.3

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.

CVSS v3: 4.3
EG Score: 4.3(medium)
EPSS: 48.1%
KEV: Not listed

Published

December 8, 2020

Last Modified

November 21, 2024

References (6)

product-security@applehttp://seclists.org/fulldisclosure/2020/Dec/32
product-security@applehttps://support.apple.com/en-us/HT211292
product-security@applehttps://support.apple.com/en-us/HT211931
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2020/Dec/32
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT211292
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/en-us/HT211931

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-1021Improper Restriction of Rendered UI Layers or Frames (Clickjacking)

Data Freshness Timeline

(refreshed 10× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-23 04:35 UTCEG score recompute
2026-05-23 04:35 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2020-9942?

CVE-2020-9942 is a medium vulnerability published on December 8, 2020. 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.

When was CVE-2020-9942 disclosed?

CVE-2020-9942 was first published in the National Vulnerability Database on December 8, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-9942 actively exploited?

CVE-2020-9942 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 48.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-9942?

CVE-2020-9942 has a CVSS v3 base score of 4.3 (NVD).

How do I remediate CVE-2020-9942?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-9942, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2020-9942

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-9942?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)