What is CVE-2017-18477?

CVE-2017-18477 is a medium-severity vulnerability in Cpanel, classified under CWE-254. CVSS score: 6.5/10. Published 2019-08-05.

How severe is CVE-2017-18477?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Cpanel

CVE-2017-18477

In cPanel before 62.0.4, Exim transports could execute in the context of the nobody account (SEC-206).

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.4% 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-254

References

documentation.cpanel.net/display/CL/62+Change+Log (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2017-18477?: CVE-2017-18477 is a medium-severity vulnerability in Cpanel, classified under CWE-254. CVSS score: 6.5/10. Published 2019-08-05.
How severe is CVE-2017-18477?: Medium severity. CVSS v3 base score is 6.5 out of 10.