Vulnerability Intelligence Report
Google Chromium PopupBlocker Security Bypass Vulnerability
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.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
6.5
MEDIUM
Exploitability:2.9
Impact Score:3.6
EPSS Probability:16.61%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-863 ↗CWE-863 Incorrect Authorization
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Chrome | unspecified < 91.0.4472.77 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Chrome · Vendor · USA |
| Reserved | 2021-04-13T00:00:00 |
| Published | 2021-06-07T19:25:48 |
| Last Updated | 2025-10-21T23:25:43 |
Community Chatter & Buzz