CVE-2021-21228: Debian Linux

Medium severity, CVSS 4.3. EPSS: 1.1% chance of exploitation in the next 30 days.

Insufficient policy enforcement in extensions in Google Chrome prior to 90.0.4430.93 allowed an attacker who convinced a user to install a malicious extension to bypass navigation restrictions via a crafted Chrome Extension.

Affected products

• Debian Debian Linux: version 10.0 only
• Fedoraproject Fedora: version 32 only; version 33 only; version 34 only
• Google Chrome: before 90.0.4430.93 (fixed in 90.0.4430.93)

Published 2021-04-30. Last modified 2026-06-17.