CVE-2021-30533

MEDIUM6.5

CISA KEV

Published 2021-06-07 · Updated 2026-06-17 · Source chrome-cve-admin@google.com

Summary

CVE-2021-30533 is a medium-severity (CVSS 6.5) vulnerability in Google Chromium PopupBlocker. CISA added it to the Known Exploited Vulnerabilities catalog on June 27, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by July 18, 2022. CISA does not currently list it as used in ransomware campaigns. Google has 76 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

All 76 known-exploited Google vulnerabilities →

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.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

CWE-863CWE-863

CISA Known-Exploited Vulnerability

Product: Google — Chromium PopupBlocker

Name: Google Chromium PopupBlocker Security Bypass Vulnerability

Date added: 2022-06-27 · Due: 2022-07-18

Required action: Apply updates per vendor instructions.

References

View on NVD

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