CVE-2021-30533
Google Chromium PopupBlocker Security Bypass Vulnerability
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run Chromium PopupBlocker, fix it now.
CISA required action: Apply updates per vendor instructions.
US federal civilian agencies must remediate by Jul 18, 2022.
Patch status
Official fix available since
Apply the vendor's update to every affected system. Check the fixed-in versions below where known.
Basis: NVD patch reference
Description
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.
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
Affected products
| Product | Vendor | Affected versions | Fixed in | Source |
|---|---|---|---|---|
| Chrome | < 91.0.4472.77 | 91.0.4472.77 | NVD | |
| Chromium PopupBlocker | — | — | KEV |
Sources: NVD = NIST National Vulnerability Database; KEV = CISA Known Exploited Vulnerabilities catalog.
Intelligence timeline
Developments from the last 30 days, newest first.
- CVSS scoredUpdateKEV
CVE-2021-30533 scored CVSS 6.5: Google Chromium PopupBlocker, Google Chromium PopupBlocker Security Bypass Vulnerability
CISA lists this as exploited in the wild. Unpatched Chromium PopupBlocker systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
- Patch releasedUpdateKEV
Patch released for CVE-2021-30533: Google Chromium PopupBlocker, Google Chromium PopupBlocker Security Bypass Vulnerability
An official fix is now available for Google Chromium PopupBlocker. This vulnerability is being exploited, so apply it promptly.
Basis: NVD patch reference
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Coverage
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