What is CVE-2018-20924?

CVE-2018-20924 is a medium-severity vulnerability in Cpanel, classified under Improper Authentication. CVSS score: 5.5/10. Published 2019-08-01.

How severe is CVE-2018-20924?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Auth bypass in Cpanel

CVE-2018-20924

cPanel before 70.0.23 allows arbitrary file-read and file-unlink operations via WHM style uploads (SEC-378).

Vulnerability class: Broken Authentication

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

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

documentation.cpanel.net/display/CL/70+Change+Log (Release Notes, Vendor Advisory)
news.cpanel.com/cpanel-tsr-2018-0002-full-disclosure/ (Vendor Advisory)

Frequently asked questions

What is CVE-2018-20924?: CVE-2018-20924 is a medium-severity vulnerability in Cpanel, classified under Improper Authentication. CVSS score: 5.5/10. Published 2019-08-01.
How severe is CVE-2018-20924?: Medium severity. CVSS v3 base score is 5.5 out of 10.