What is CVE-2017-18441?

CVE-2017-18441 is a medium-severity vulnerability in Cpanel, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.0/10. Published 2019-08-02.

How severe is CVE-2017-18441?

Medium severity. CVSS v3 base score is 5.0 out of 10.

Open Redirect in Cpanel

CVE-2017-18441

cPanel before 64.0.21 allows demo accounts to redirect web traffic (SEC-245).

Vulnerability class: Open Redirect

Published 2019-08-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

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

References

documentation.cpanel.net/display/CL/64+Change+Log (Product, Release Notes)
news.cpanel.com/cpanel-tsr-2017-0003-full-disclosure/ (Vendor Advisory)

Frequently asked questions

What is CVE-2017-18441?: CVE-2017-18441 is a medium-severity vulnerability in Cpanel, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 5.0/10. Published 2019-08-02.
How severe is CVE-2017-18441?: Medium severity. CVSS v3 base score is 5.0 out of 10.