How severe is CVE-2019-8754?

CVE-2019-8754 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-2019-8754 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-8754?

CVE-2019-8754 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-8754?

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

When was CVE-2019-8754 published?

CVE-2019-8754 was published on 2020-10-27 and last updated on 2026-06-17.

CVE-2019-8754

CVE-2019-8754 is a medium-severity vulnerability in Apple Mac Os X 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. The underlying weakness is classified as CWE-346.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.3
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-346
Affected product: Apple Mac Os X
Published: 2020-10-27
Last modified: 2026-06-17

Description

A cross-origin issue existed with "iframe" elements. This was addressed with improved tracking of security origins. This issue is fixed in macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006. A malicious HTML document may be able to render iframes with sensitive user information.

Frequently asked questions

What is CVE-2019-8754?: A cross-origin issue existed with "iframe" elements. This was addressed with improved tracking of security origins. This issue is fixed in macOS Catalina 10.15.1, Security Update 2019-001, and Security Update 2019-006. A malicious HTML document may be able to render iframes with sensitive user information.
How severe is CVE-2019-8754?: CVE-2019-8754 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-2019-8754 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-8754?: CVE-2019-8754 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-8754?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-8754 published?: CVE-2019-8754 was published on 2020-10-27 and last updated on 2026-06-17.

References

https://support.apple.com/en-us/HT210722

Affected products (1)

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

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