Vulnerability · Published Jul 7, 2020 · Assigned by GitHub_M

CVE-2020-4076Context isolation bypass via leaked cross-context objects in Electron

High 7.8

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 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)0.4%top 69.3% 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 contextIsolation 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-m93v-9qjc-3g79
npm	electron	8.2.4	GHSA-m93v-9qjc-3g79

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

References

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