CVEvulnerability

CVE-2021-30533

6.5 MEDIUM Known exploited Published 2021-06-07 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Google Chromium PopupBlocker Security Bypass Vulnerability — Google Chromium PopupBlocker

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.

Added to KEV: 2022-06-27
Remediation due: 2022-07-18
Ransomware use: Unknown
Required action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2021-30533

Status: Analyzed
Published: 2021-06-07
Last modified: 2026-06-17
Assigner: [email protected]
CVSS 3.1 ([email protected]): 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS 2.0 ([email protected]): 4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:P/A:N
Weaknesses: CWE-863

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.

Affected configurations

• google chrome (< 91.0.4472.77) • fedoraproject fedora 33 • fedoraproject fedora 34

Weakness · CWE (1)

CWE-863 Incorrect Authorization weakness

References