How severe is CVE-2020-9995?

CVE-2020-9995 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-2020-9995 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-9995?

CVE-2020-9995 affects Apple Macos Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-9995?

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

When was CVE-2020-9995 published?

CVE-2020-9995 was published on 2021-04-02 and last updated on 2026-06-17.

CVE-2020-9995

CVE-2020-9995 is a medium-severity vulnerability in Apple Macos Server 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v2: 5.8
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Apple Macos Server
Published: 2021-04-02
Last modified: 2026-06-17

Description

An issue existed in the parsing of URLs. This issue was addressed with improved input validation. This issue is fixed in macOS Server 5.11. Processing a maliciously crafted URL may lead to an open redirect or cross site scripting.

Frequently asked questions

What is CVE-2020-9995?: An issue existed in the parsing of URLs. This issue was addressed with improved input validation. This issue is fixed in macOS Server 5.11. Processing a maliciously crafted URL may lead to an open redirect or cross site scripting.
How severe is CVE-2020-9995?: CVE-2020-9995 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-2020-9995 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-9995?: CVE-2020-9995 affects Apple Macos Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-9995?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-9995 published?: CVE-2020-9995 was published on 2021-04-02 and last updated on 2026-06-17.

References

https://support.apple.com/en-us/HT211932

Affected products (1)

cpe:2.3:o:apple:macos_server:*:*:*:*:*:*:*:*

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