What is CVE-2018-20917?

CVE-2018-20917 is a medium-severity vulnerability in Cpanel, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2019-08-01.

How severe is CVE-2018-20917?

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

Improper input validation in Cpanel

CVE-2018-20917

cPanel before 70.0.23 allows any user to disable Solr (SEC-371).

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

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

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.003 (25.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

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

Frequently asked questions

What is CVE-2018-20917?: CVE-2018-20917 is a medium-severity vulnerability in Cpanel, classified under Improper Input Validation. CVSS score: 5.5/10. Published 2019-08-01.
How severe is CVE-2018-20917?: Medium severity. CVSS v3 base score is 5.5 out of 10.