What is CVE-2018-20913?

CVE-2018-20913 is a medium-severity vulnerability in Cpanel, classified under Information Disclosure. CVSS score: 4.9/10. Published 2019-08-01.

How severe is CVE-2018-20913?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Information disclosure in Cpanel

CVE-2018-20913

cPanel before 70.0.23 allows attackers to read the root accesshash via the WHM /cgi/trustclustermaster.cgi (SEC-364).

Vulnerability class: Information Disclosure

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

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (56.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

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

Frequently asked questions

What is CVE-2018-20913?: CVE-2018-20913 is a medium-severity vulnerability in Cpanel, classified under Information Disclosure. CVSS score: 4.9/10. Published 2019-08-01.
How severe is CVE-2018-20913?: Medium severity. CVSS v3 base score is 4.9 out of 10.