What is CVE-2021-38585?

CVE-2021-38585 is a high-severity vulnerability in Cpanel, classified under Deserialization of Untrusted Data. CVSS score: 7.2/10. Published 2021-08-11.

How severe is CVE-2021-38585?

High severity. CVSS v3 base score is 7.2 out of 10.

Deserialization in Cpanel

CVE-2021-38585

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

Vulnerability class: Insecure Deserialization

Published 2021-08-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.4th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

docs.cpanel.net/changelogs/98-change-log/ (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2021-38585?: CVE-2021-38585 is a high-severity vulnerability in Cpanel, classified under Deserialization of Untrusted Data. CVSS score: 7.2/10. Published 2021-08-11.
How severe is CVE-2021-38585?: High severity. CVSS v3 base score is 7.2 out of 10.