CVE-2021-30533: Google Chromium PopupBlocker Security Bypass Vulnerability

CISA Known Exploited Vulnerability (KEV)

Description

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.

Required action (CISA)

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-30533

Weakness behind it

CISA records this vulnerability as an instance of CWE-863. From there the chain continues into CAPEC attack patterns and ATT&CK techniques, all inside this corpus.

References

• NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-30533
• KEV catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog