How severe is CVE-2015-5780?

CVE-2015-5780 has a CVSS 2.0 base score of 10.0, rated critical severity.

Is CVE-2015-5780 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-5780?

CVE-2015-5780 affects Apple Safari. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-5780?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2015-5780 published?

CVE-2015-5780 was published on 2015-10-09 and last updated on 2026-06-17.

CVE-2015-5780

CVE-2015-5780 is a critical-severity vulnerability in Apple Safari with a CVSS 2.0 base score of 10.0. 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: Critical (CVSS 2.0 base score 10.0)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apple Safari
Published: 2015-10-09
Last modified: 2026-06-17

Description

The Safari Extensions implementation in Apple Safari before 9 does not require user confirmation before replacing an installed extension, which has unspecified impact and attack vectors.

Frequently asked questions

What is CVE-2015-5780?: The Safari Extensions implementation in Apple Safari before 9 does not require user confirmation before replacing an installed extension, which has unspecified impact and attack vectors.
How severe is CVE-2015-5780?: CVE-2015-5780 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2015-5780 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-5780?: CVE-2015-5780 affects Apple Safari. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-5780?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-5780 published?: CVE-2015-5780 was published on 2015-10-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*

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