Is CVE-2021-30533 actively exploited?

CVE-2021-30533 has no public evidence of in-the-wild exploitation as of 2025-10-24.

What is the CVSS score for CVE-2021-30533?

CVE-2021-30533 has a CVSS score of 6.5 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

How do I patch CVE-2021-30533?

Patch guidance is available from google security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-30533.

CVE-2021-30533 - remediation guidance & executive summary

Q: Which products are affected by CVE-2021-30533?

3 products: google chrome, fedoraproject fedora, fedoraproject fedora.

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 Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: required
Scope: unchanged
Confidentiality: none
Integrity: high
Availability: none
Weaknesses: CWE-863 · Incorrect Authorization CWE-863 · Incorrect Authorization

Metadata

Primary Vendor: GOOGLE
Published: 6/7/2021
Last Modified: 10/24/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2021-30533

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary