How severe is CVE-2021-30615?

CVE-2021-30615 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-30615 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30615?

CVE-2021-30615 primarily affects Microsoft Edge. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-30615?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-30615 published?

CVE-2021-30615 was published on 2021-09-03 and last updated on 2026-06-17.

CVE-2021-30615

CVE-2021-30615 is a medium-severity vulnerability in Microsoft Edge with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Edge
Published: 2021-09-03
Last modified: 2026-06-17

Description

Chromium: CVE-2021-30615 Cross-origin data leak in Navigation

Frequently asked questions

What is CVE-2021-30615?: Chromium: CVE-2021-30615 Cross-origin data leak in Navigation
How severe is CVE-2021-30615?: CVE-2021-30615 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-30615 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30615?: CVE-2021-30615 primarily affects Microsoft Edge. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-30615?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-30615 published?: CVE-2021-30615 was published on 2021-09-03 and last updated on 2026-06-17.

References

Affected products (3)

cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:edge:*:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:edge_chromium:*:*:*:*:*:*:*:*

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