Actively exploited in the wild
Google Chromium PopupBlocker Security Bypass Vulnerability
Google - Chromium PopupBlocker · Listed in the CISA KEV since 2022-06-27. This indicates confirmed attacks in production environments.
Required action: Apply updates per vendor instructions.
CVE-2021-30533
MediumCVSS 6.5KEVSummary
Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.
Risk Assessment
An attacker can bypass navigation restrictions, potentially leading to phishing or other attacks exploiting user trust.
Recommendation
Update Google Chrome to version 91.0.4472.77 or later.
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Original NVD description (English source)
Insufficient policy enforcement in PopupBlocker in Google Chrome prior to 91.0.4472.77 allowed a remote attacker to bypass navigation restrictions via a crafted iframe.