All vulnerabilities
CVE-2021-30533

Google Chromium PopupBlocker Security Bypass Vulnerability

Google Chromium PopupBlockerApplications & CMS
Open in ThreatlineRecord JSON
CVSS
6.5Medium
ExploitationExploited in the wildAdded to KEV 27 Jun 2022CISA KEV
Exploit odds (EPSS)16.7%Chance of exploitation activity in the next 30 days, higher than 97% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in91.0.4472.77Fixed versionCVE List
Federal deadline18 Jul 2022Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 7 Jun 2021, 19:25 UTCPublishedCVE List
  2. 27 Jun 2022Added to CISA KEVCISA 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.

Text from CVE List

Affected versions 1

  • Chromeaffected: unspecified before 91.0.4472.77CVE List

References 7