CVE-2021-21127

Public Exploit

Description

Insufficient policy enforcement in extensions in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass content security policy via a crafted Chrome Extension.

8.8

CVSS

Severity: High

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.86% Top 30%

Vendor Advisory googleblog.com Vendor Advisory crbug.com

Affected: Google Chrome

References

Link	Tags
https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_19.html	release notes vendor advisory
https://crbug.com/1115590	issue tracking exploit vendor advisory
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21127	third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-21127?: CVE-2021-21127 has been scored as a high severity vulnerability.
How to fix CVE-2021-21127?: To fix CVE-2021-21127, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21127 being actively exploited in the wild?: It is possible that CVE-2021-21127 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21127?: CVE-2021-21127 affects Google Chrome.

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