What is CVE-2021-38584?

CVE-2021-38584 is a high-severity vulnerability in Cpanel, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.2/10. Published 2021-08-11.

How severe is CVE-2021-38584?

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

XXE in Cpanel

CVE-2021-38584

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

Vulnerability class: XXE (XML External Entity)

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: 0.009 (57.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

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

Frequently asked questions

What is CVE-2021-38584?: CVE-2021-38584 is a high-severity vulnerability in Cpanel, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 7.2/10. Published 2021-08-11.
How severe is CVE-2021-38584?: High severity. CVSS v3 base score is 7.2 out of 10.