What is CVE-2017-18465?

CVE-2017-18465 is a medium-severity vulnerability in Cpanel, classified under Improper Input Validation. CVSS score: 4.4/10. Published 2019-08-05.

How severe is CVE-2017-18465?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Improper input validation in Cpanel

CVE-2017-18465

cPanel before 62.0.17 does not have a sufficient list of reserved usernames (SEC-227).

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

Published 2019-08-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (25.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.8% 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/62+Change+Log (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2017-18465?: CVE-2017-18465 is a medium-severity vulnerability in Cpanel, classified under Improper Input Validation. CVSS score: 4.4/10. Published 2019-08-05.
How severe is CVE-2017-18465?: Medium severity. CVSS v3 base score is 4.4 out of 10.