What is CVE-2019-14403?

CVE-2019-14403 is a medium-severity vulnerability in Cpanel, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2019-07-30.

How severe is CVE-2019-14403?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Open Redirect in Cpanel

CVE-2019-14403

cPanel before 78.0.18 offers an open mail relay because of incorrect domain-redirect routing (SEC-483).

Vulnerability class: Open Redirect

Published 2019-07-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.007 (51.0th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

documentation.cpanel.net/display/CL/78+Change+Log (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2019-14403?: CVE-2019-14403 is a medium-severity vulnerability in Cpanel, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2019-07-30.
How severe is CVE-2019-14403?: Medium severity. CVSS v3 base score is 4.3 out of 10.