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CVE-2021-21111

CRITICALCVSS 9.6/10EPSS 1.06%

Last modified

CVE-2021-21111 is a critical-severity vulnerability rated 9.6/10 on the CVSS scale. Insufficient policy enforcement in WebUI in Google Chrome prior to 87.0.4280.141 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension.. EPSS estimates a 1.06% chance of exploitation in the next 30 days.

Description

Insufficient policy enforcement in WebUI in Google Chrome prior to 87.0.4280.141 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension.

Metrics

CVSS 3.1
9.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS Probability
1.06%

60.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
GoogleChrome< 87.0.4280.141
FedoraprojectFedora32
FedoraprojectFedora33
DebianDebian Linux10.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-21111?
Insufficient policy enforcement in WebUI in Google Chrome prior to 87.0.4280.141 allowed an attacker who convinced a user to install a malicious extension to potentially perform a sandbox escape via a crafted Chrome Extension.
How severe is CVE-2021-21111?
CVE-2021-21111 has a CVSS score of 9.6/10 (CRITICAL severity). The EPSS model estimates a 1.06% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21111?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST