CVE-2021-30533Insufficient 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.
Updated under an hour ago ()
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It affects Google Chrome and 1 other product. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jun 27, 2022; federal agencies had to remediate by Jul 18, 2022. Treat that date as your deadline.
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Free account, 1 product
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.
- CVSS
- 6.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- Weakness (CWE)
- CWE-863
- Known exploited
- Added to CISA KEV Jun 27, 2022; federal remediation due Jul 18, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 16.74% (percentile 97)
- Assigned by
- Chrome
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Google Chrome google:chrome (from the name) | from unspecified before 91.0.4472.77 | CNA record |
google chrome google:chrome | before 91.0.4472.77 | NVD |
fedoraproject fedora fedoraproject:fedora | 33; 34 | NVD |
References
- https://chromereleases.googleblog.com/2021/05/stable-channel-update-for-desktop_25.htmlx-refsource-misc, release-notes, vendor-advisory
- https://crbug.com/1145553x-refsource-misc, exploit, issue-tracking, patch, vendor-advisory
- https://security.gentoo.org/glsa/202107-06vendor-advisory, x-refsource-gentoo, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/vendor-advisory, x-refsource-fedora, mailing-list, release-notes
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/vendor-advisory, x-refsource-fedora, mailing-list, release-notes
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30533us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.