How severe is CVE-2021-38585?

CVE-2021-38585 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-38585 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38585?

CVE-2021-38585 affects Cpanel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38585?

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

When was CVE-2021-38585 published?

CVE-2021-38585 was published on 2021-08-11 and last updated on 2026-06-17.

CVE-2021-38585

CVE-2021-38585 is a high-severity vulnerability in Cpanel with a CVSS 3.x base score of 7.2. 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-502.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 6.5
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Cpanel
Published: 2021-08-11
Last modified: 2026-06-17

Description

The WHM Locale Upload feature in cPanel before 98.0.1 allows unserialization attacks (SEC-585).

Frequently asked questions

What is CVE-2021-38585?: The WHM Locale Upload feature in cPanel before 98.0.1 allows unserialization attacks (SEC-585).
How severe is CVE-2021-38585?: CVE-2021-38585 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-38585 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38585?: CVE-2021-38585 affects Cpanel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38585?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-38585 published?: CVE-2021-38585 was published on 2021-08-11 and last updated on 2026-06-17.

References

https://docs.cpanel.net/changelogs/98-change-log/

Affected products (1)

cpe:2.3:a:cpanel:cpanel:*:*:*:*:*:*:*:*

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