CVE-2020-4077

CriticalCVSS 9.9/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 9.9/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-501

Affected software

Vendor	Product	Versions
electron	electron	>= 9.0.0-beta.0, <= 9.0.0-beta.20; >= 8.0.0, < 8.2.4; < 7.2.4

References

https://github.com/electron/electron/security/advisories/GHSA-h9jc-284h-533gThird Party Advisory
https://www.electronjs.org/releases/stable?page=3#release-notes-for-v824Release Notes, Vendor Advisory
https://github.com/electron/electron/security/advisories/GHSA-h9jc-284h-533gThird Party Advisory
https://www.electronjs.org/releases/stable?page=3#release-notes-for-v824Release Notes, Vendor Advisory

Timeline

Published: Jul 7, 2020
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2020

CVE-2020-40797.7Combodo iTop is a web based IT Service Management tool. In iTop before versions 2.7.2 and 2.8.0, when the ajax endpoint for the "excel expor CVE-2020-40806.1HCL Verse v10 and v11 is susceptible to a Stored Cross-Site Scripting (XSS) vulnerability due to improper handling of message content. An un CVE-2020-40816.1In Digital Experience 8.5, 9.0, and 9.5, WSRP consumer is vulnerable to cross-site scripting (XSS).CVE-2020-40825.4The HCL Connections 5.5 help system is vulnerable to cross-site scripting, caused by improper validation of user-supplied input. A remote at CVE-2020-40835.5HCL Connections 6.5 is vulnerable to possible information leakage. Connections could disclose sensitive information via trace logs to a loca CVE-2020-40845.4HCL Connections v5.5, v6.0, and v6.5 are vulnerable to cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript c CVE-2020-40856.5"HCL Connections is vulnerable to possible information leakage and could disclose sensitive information via stack trace to a local user."CVE-2020-40896.5HCL Notes is vulnerable to an information leakage vulnerability through its support for the 'mailto' protocol. This vulnerability could resu CVE-2020-40925.3"If port encryption is not enabled on the Domino Server, HCL Nomad on Android and iOS Platforms will communicate in clear text and does not CVE-2020-40956.0"BigFix Platform is storing clear text credentials within the system's memory. An attacker who is able to gain administrative privileges can CVE-2020-40976.8In HCL Notes version 9 previous to release 9.0.1 FixPack 10 Interim Fix 8, version 10 previous to release 10.0.1 FixPack 6 and version 11 pr CVE-2020-40997.5The application was signed using a key length less than or equal to 1024 bits, making it potentially vulnerable to forged digital signatures