CVE-2021-21172: Insufficient policy enforcement in File System API

Published Nov 19, 2020
·
Updated

Insufficient policy enforcement in File System API in Google Chrome on Windows prior to 89.0.4389.72 allowed a remote attacker to bypass filesystem restrictions via a crafted HTML page.

Credit

Maciej Pulikowski

Affected Software

8 affected componentsFixes available
debian/chromium
90.0.4430.212-1~deb10u1116.0.5845.180-1~deb11u1118.0.5993.70-1~deb11u1116.0.5845.180-1~deb12u1118.0.5993.70-1~deb12u1118.0.5993.70-1
Google Chrome<89.0.4389.72
89.0.4389.72
Google Chrome<89.0.4389.72
Microsoft Windows
Fedoraproject Fedora=32
Fedoraproject Fedora=33
Fedoraproject Fedora=34
Debian Debian Linux=10.0

Remediation

Event History

Nov 19, 2020
CVE Published
12:00 AM
Mar 9, 2021
CVE Published
via MITRE·05:46 PM
Data Sourced
via MITRE·05:46 PM
DescriptionWeakness

Parent advisories

This vulnerability appears in the following advisories.

Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2021-21172?

CVE-2021-21172 is classified as a high severity vulnerability due to its potential for exploitation by remote attackers to bypass filesystem restrictions.

2

How do I fix CVE-2021-21172?

To mitigate CVE-2021-21172, users should update Google Chrome to version 89.0.4389.72 or later.

3

What does CVE-2021-21172 affect?

CVE-2021-21172 affects Google Chrome versions prior to 89.0.4389.72 and allows remote attackers to bypass filesystem restrictions.

4

Is CVE-2021-21172 specific to any operating system?

CVE-2021-21172 primarily impacts Google Chrome running on Windows and other operating systems that support the affected versions.

5

Can an attacker exploit CVE-2021-21172 without user interaction?

Yes, CVE-2021-21172 can be exploited through a crafted HTML page, which may allow for remote execution without direct user interaction.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203