What is CVE-2018-20938?

CVE-2018-20938 is a low-severity vulnerability in Cpanel, classified under Improper Access Control. CVSS score: 2.7/10. Published 2019-08-01.

How severe is CVE-2018-20938?

Low severity. CVSS v3 base score is 2.7 out of 10.

Vulnerability in Cpanel

CVE-2018-20938

cPanel before 68.0.27 does not enforce ownership during addpkgext and delpkgext WHM API calls (SEC-324).

Published 2019-08-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.7 (Low). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

documentation.cpanel.net/display/CL/68+Change+Log (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2018-20938?: CVE-2018-20938 is a low-severity vulnerability in Cpanel, classified under Improper Access Control. CVSS score: 2.7/10. Published 2019-08-01.
How severe is CVE-2018-20938?: Low severity. CVSS v3 base score is 2.7 out of 10.