CVE-2021-30534: Fedoraproject Fedora

Medium severity, CVSS 6.5. EPSS: 1.2% chance of exploitation in the next 30 days.

Insufficient policy enforcement in iFrameSandbox in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page.

Affected products

• Fedoraproject Fedora: version 33 only; version 34 only
• Google Chrome: before 91.0.4472.77 (fixed in 91.0.4472.77)

Published 2021-06-07. Last modified 2026-06-17.