CVE-2021-30507

CVE-2021-30507 is a high-severity vulnerability in Google Chrome with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-829.

Key facts

Description

Inappropriate implementation in Offline in Google Chrome on Android prior to 90.0.4430.212 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page.

Frequently asked questions

What is CVE-2021-30507?
Inappropriate implementation in Offline in Google Chrome on Android prior to 90.0.4430.212 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page.
How severe is CVE-2021-30507?
CVE-2021-30507 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-30507 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30507?
CVE-2021-30507 primarily affects Google Chrome. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-30507?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-30507 published?
CVE-2021-30507 was published on 2021-06-04 and last updated on 2026-06-17.

References

Affected products (3)

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