Auth bypass in Google Chrome
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.
Vulnerability class: Broken Access Control
EPSS: 0.166 (96.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
Affected products
- Google Chrome — versions unspecified
- Fedoraproject Fedora — versions 33, 34
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- chrome-cve-admin@google.com (x_refsource_MISC, Release Notes, Vendor Advisory)
- chrome-cve-admin@google.com (Exploit, Patch, x_refsource_MISC, Issue Tracking, Vendor Advisory)
- chrome-cve-admin@google.com (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- chrome-cve-admin@google.com (x_refsource_FEDORA, vendor-advisory, Mailing List, Release Notes)
- chrome-cve-admin@google.com (x_refsource_FEDORA, vendor-advisory, Mailing List, Release Notes)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-30533?
- CVE-2021-30533 is a medium-severity vulnerability in Google Chrome, classified under Incorrect Authorization. CVSS score: 6.5/10. Published 2021-06-07.
- How severe is CVE-2021-30533?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2021-30533 known to be exploited?
- Yes. CVE-2021-30533 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-06-27), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.