What is CVE-2018-20879?

CVE-2018-20879 is a medium-severity vulnerability in Cpanel, classified under Improper Input Validation. CVSS score: 6.3/10. Published 2019-08-01.

How severe is CVE-2018-20879?

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

Improper input validation in Cpanel

CVE-2018-20879

cPanel before 74.0.8 allows demo accounts to execute arbitrary code via the Fileman::viewfile API (SEC-444).

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

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 (61.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 61.1% 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-20 — Improper Input Validation

References

documentation.cpanel.net/display/CL/74+Change+Log (Product, Release Notes)

Frequently asked questions

What is CVE-2018-20879?: CVE-2018-20879 is a medium-severity vulnerability in Cpanel, classified under Improper Input Validation. CVSS score: 6.3/10. Published 2019-08-01.
How severe is CVE-2018-20879?: Medium severity. CVSS v3 base score is 6.3 out of 10.