What is the CVSS score of CVE-2020-4076?

CVE-2020-4076 has a CVSS 3.1 base score of 9.0 (Critical). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N. EPSS exploitation probability: 0.4%.

Is there a patch available for CVE-2020-4076?

Yes, a patch is available for CVE-2020-4076. Update the affected software to the latest version immediately.

Electron CVE-2020-4076

CRITICAL

Trust Boundary Violation (CWE-501)

2020-07-07 security-advisories@github.com

Authentication Bypass Electron Electronjs

9.0

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-501 OWASP Top 10:2025 A06:2025 - Insecure Design ASVS 5.0 V14 - Data Protection Trust boundary enforcement
Impact	CVSS score of 9.0 (CRITICAL). Attack characteristics: local attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 0.4% exploitation probability (EPSS)

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AnalysisAI

In Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21, there is a context isolation bypass. Rated critical severity (CVSS 9.0), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

npm electron fix: 7.2.4, 8.2.4

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in npm

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-501. 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 contextIsolation are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4. Affected products include: Electronjs Electron.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.0 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

DescriptionNVD

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 contextIsolation are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.

Threat Intelligence Overview

EPSS Score

0.4%

Top 71% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 0.4%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Defer

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +45

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)NVD

cpe:2.3:a:electronjs:electron:*:*:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:-:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta1:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta10:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta11:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta12:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta13:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta14:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta15:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta16:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta17:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta18:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta19:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta2:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta20:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta3:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta4:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta5:*:*:*:*:*:*

cpe:2.3:a:electronjs:electron:9.0.0:beta6:*:*:*:*:*:*

+ 3 more

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In Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21, there is a context isolation bypass. Rated critical severity

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References

Advisories & patches

ADVISORY https://www.electronjs.org/releases/stable?page=3#release-notes-for-v824 REF https://github.com/electron/electron/security/advisories/GHSA-m93v-9qjc-3g79

Search Externally

GitHub PoC

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