# CVE-2021-30533

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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-30533
- CVSS: 6.5
- Known exploited: yes, in CISA KEV since 2022-06-27; CISA due date 2022-07-18
- EPSS: 16.74% (percentile 97.1)
- CISA SSVC: exploitation active, automatable no, technical impact partial (assessed 2025-02-04)
- Weakness: CWE-863
- Published: 2021-06-07

## Affected versions

- Google Chrome: affected < 91.0.4472.77

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://chromereleases.googleblog.com/2021/05/stable-channel-update-for-desktop_25.html
- [other] https://crbug.com/1145553
- [advisory] https://security.gentoo.org/glsa/202107-06
- [advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAT6EOXVQFE6JFMFQF4IKAOUQSHMHL54/
- [advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ETMZL6IHCTCTREEL434BQ4THQ7EOHJ43/
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30533

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.