Vulnerability Details : CVE-2021-30533

Potential exploit
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.
Published 2021-06-07 20:15:09
Updated 2025-02-05 14:01:03
Source Chrome
View at NVD,   CVE.org

Products affected by CVE-2021-30533

CVE-2021-30533 is in the CISA Known Exploited Vulnerabilities Catalog

CISA vulnerability name:
Google Chromium PopupBlocker Security Bypass Vulnerability
CISA required action:
Apply updates per vendor instructions.
CISA 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, Micr
Notes:
https://nvd.nist.gov/vuln/detail/CVE-2021-30533
Added on 2022-06-27 Action due date 2022-07-18

Exploit prediction scoring system (EPSS) score for CVE-2021-30533

EPSS FAQ
6.19%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 90 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-30533

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
 MEDIUM AV:N/AC:M/Au:N/C:N/I:P/A:N
8.6
2.9
 NIST
6.5
 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
2.8
3.6
 134c704f-9b21-4f2e-91b3-4a467353bcc0 2025-02-03
6.5
 MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
2.8
3.6
 NIST

CWE ids for CVE-2021-30533

  • The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
    Assigned by:
    • 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)
    • nvd@nist.gov (Primary)

References for CVE-2021-30533

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