Vulnerability · Published Jul 7, 2020 · Assigned by GitHub_M

CVE-2020-4077Context isolation bypass via contextBridge in Electron

High 7.7

In plain English

A high-severity security flaw in electron from electron. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 63% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.7High

Exploit odds (30 days)1.0%top 36.9% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	electron	7.2.4	GHSA-h9jc-284h-533g
npm	electron	8.2.4	GHSA-h9jc-284h-533g

Affected products (as reported)

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

Weakness: CWE-501 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

References

https://github.com/electron/electron/security/advisories/GHSA-h9jc-284h-533g x_refsource_CONFIRM
https://www.electronjs.org/releases/stable?page=3#release-notes-for-v824 x_refsource_MISC