CVE-2021-21139

moderate-risk
Published 2021-02-09

Inappropriate implementation in iframe sandbox in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to bypass navigation restrictions via a crafted HTML page.

Do I need to act?

~
5.0% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.5/10 Medium
NETWORK / LOW complexity

Affected Products (2)

Affected Vendors

Microsoft Google

References (6)

Release Notes https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_...
Exploit https://crbug.com/937131
Third Party Advisory https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21139
Release Notes https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_...
Exploit https://crbug.com/937131
Third Party Advisory https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21139
39
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 8/34 · Low
Exposure 7/34 · Low