CVE-2021-30533
Google Chromium PopupBlocker Security Bypass Vulnerability
Google · Chromium PopupBlocker
Vulnerability details
Google Chromium PopupBlocker contains an insufficient policy enforcement vulnerability that allows a remote attacker to bypass navigation restrictions via a crafted iframe. This vulnerability could affect multiple web browsers that utilize Chromium, including, but not limited to, Google Chrome, Microsoft Edge, and Opera.
Added to CISA KEV: 2022-06-27
Ransomware campaign use: Unknown
CISA due date: 2022-07-18
Defensive guidance from CISA
Apply updates per vendor instructions.
This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.
Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC