Is CVE-2020-4077 in the CISA KEV catalog?

No. CVE-2020-4077 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-4077?

CVE-2020-4077 has a CVSS v3 base score of 7.7 (HIGH).

What is the EPSS score for CVE-2020-4077?

CVE-2020-4077 has an EPSS score of 1.00% (59th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-4077?

Upgrade electron to 8.2.4 or later.

CVE & CISA-KEV Catalog

CVE-2020-4077

HIGH

7.7

CVSS v3

NVD

Description

In Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21, there is a context isolation bypass. Code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions. Apps using both `contextIsolation` and `contextBridge` are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.

CWE-501

How to fix

Remediation Available

electronNVD

Affected:>= 8.0.0, < 8.2.4Fixed in:8.2.4CVE-2020-4077derived from NVD

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

1.00%probability of exploitation in 30 days

59thpercentile

Moderate risk: more likely to be exploited than 59% of all known CVEs.

References

Vendor Advisory1

electronjs.org

Third-Party Advisory1

github.com

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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.