CVE-2021-21135

moderate-risk
Published 2021-02-09

Inappropriate implementation in Performance API in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to leak cross-origin data via a crafted HTML page.

Do I need to act?

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24.9% chance of exploitation in next 30 days
EPSS score — higher than 75% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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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_...
Permissions Required https://crbug.com/1157818
Third Party Advisory https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21135
Release Notes https://chromereleases.googleblog.com/2021/01/stable-channel-update-for-desktop_...
Permissions Required https://crbug.com/1157818
Third Party Advisory https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-21135
46
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 15/34 · Moderate
Exposure 7/34 · Low