How severe is CVE-2020-3884?

CVE-2020-3884 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2020-3884 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-3884?

CVE-2020-3884 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-3884?

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

When was CVE-2020-3884 published?

CVE-2020-3884 was published on 2020-04-01 and last updated on 2026-06-17.

CVE-2020-3884

CVE-2020-3884 is a medium-severity vulnerability in Apple Mac Os X with a CVSS 3.x base score of 6.1. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apple Mac Os X
Published: 2020-04-01
Last modified: 2026-06-17

Description

An injection issue was addressed with improved validation. This issue is fixed in macOS Catalina 10.15.4. A remote attacker may be able to cause arbitrary javascript code execution.

Frequently asked questions

What is CVE-2020-3884?: An injection issue was addressed with improved validation. This issue is fixed in macOS Catalina 10.15.4. A remote attacker may be able to cause arbitrary javascript code execution.
How severe is CVE-2020-3884?: CVE-2020-3884 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2020-3884 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-3884?: CVE-2020-3884 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-3884?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-3884 published?: CVE-2020-3884 was published on 2020-04-01 and last updated on 2026-06-17.

References

https://support.apple.com/HT211100

Affected products (1)

cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*

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