What is CVE-2018-20931?

CVE-2018-20931 is a medium-severity vulnerability in Cpanel, classified under Code Injection. CVSS score: 6.3/10. Published 2019-08-01.

How severe is CVE-2018-20931?

Medium severity. CVSS v3 base score is 6.3 out of 10.

RCE in Cpanel

CVE-2018-20931

cPanel before 70.0.23 allows demo accounts to execute code via the Landing Page (SEC-405).

Vulnerability class: RCE (Remote Code Execution)

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

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.010 (60.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.8% 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-94 — Code Injection

References

documentation.cpanel.net/display/CL/70+Change+Log (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2018-20931?: CVE-2018-20931 is a medium-severity vulnerability in Cpanel, classified under Code Injection. CVSS score: 6.3/10. Published 2019-08-01.
How severe is CVE-2018-20931?: Medium severity. CVSS v3 base score is 6.3 out of 10.