CVE-2021-21111

CRITICAL 9.6CVE-2021-21111 · Published 08/01/2021 · updated 17/06/2026

In short

CVE-2021-21111 is a CRITICAL (CVSS 9.6) vulnerability affecting chrome (google).
Chance of exploitation in the next 30 days (EPSS): 1.1%, higher than 65.3% of all vulnerabilities.
Fix: update to 87.0.4280.141 or later.

Package	Affected versions	Patched versions
chrome google	`< 87.0.4280.141`	`87.0.4280.141`

Description

Insufficient policy enforcement in WebUI in Google Chrome prior to 87.0.4280.141 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension.

References

chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop.html · Release Notes
crbug.com/1149125 · Permissions Required
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VVUWIJKZTZTG6G475OR6PP4WPQBVM6PS
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z6P6AVVFP7B2M4H7TJQBASRZIBLOTUFN
security.gentoo.org/glsa/202101-05 · Third Party Advisory
debian.org/security/2021/dsa-4832 · Third Party Advisory

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Package

Affected versions

Patched versions

chrome

google

< 87.0.4280.141

87.0.4280.141

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