How severe is CVE-2020-4075?

CVE-2020-4075 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-4075 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-2020-4075?

CVE-2020-4075 primarily affects Electronjs Electron. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-4075?

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

When was CVE-2020-4075 published?

CVE-2020-4075 was published on 2020-07-07 and last updated on 2026-06-17.

CVE-2020-4075

CVE-2020-4075 is a medium-severity vulnerability in Electronjs Electron with a CVSS 3.x base score of 6.8. 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-552.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
CVSS v2: 2.1
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-552
Affected product: Electronjs Electron
Published: 2020-07-07
Last modified: 2026-06-17

Description

In Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21, arbitrary local file read is possible by defining unsafe window options on a child window opened via window.open. As a workaround, ensure you are calling `event.preventDefault()` on all new-window events where the `url` or `options` is not something you expect. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.

Frequently asked questions

What is CVE-2020-4075?: In Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21, arbitrary local file read is possible by defining unsafe window options on a child window opened via window.open. As a workaround, ensure you are calling `event.preventDefault()` on all new-window events where the `url` or `options` is not something you expect. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.
How severe is CVE-2020-4075?: CVE-2020-4075 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-4075 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-2020-4075?: CVE-2020-4075 primarily affects Electronjs Electron. In total, 22 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-4075?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-4075 published?: CVE-2020-4075 was published on 2020-07-07 and last updated on 2026-06-17.

References

Affected products (22)

cpe:2.3:a:electronjs:electron:*:*:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:-:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta10:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta11:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta12:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta13:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta14:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta15:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta16:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta17:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta18:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta19:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta2:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta20:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta3:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta4:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta5:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta6:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta7:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta8:*:*:*:*:*:*
cpe:2.3:a:electronjs:electron:9.0.0:beta9:*:*:*:*:*:*

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