What is CVE-2017-18450?

CVE-2017-18450 is a medium-severity vulnerability in Cpanel, classified under CWE-264. CVSS score: 4.5/10. Published 2019-08-02.

How severe is CVE-2017-18450?

Medium severity. CVSS v3 base score is 4.5 out of 10.

Vulnerability in Cpanel

CVE-2017-18450

cPanel before 64.0.21 allows certain file-chmod operations via /scripts/convert_roundcube_mysql2sqlite (SEC-255).

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

CVSS v3 metric

CVSS v3 base score 4.5 (Medium). Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (18.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 18.1% 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-264

References

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

Frequently asked questions

What is CVE-2017-18450?: CVE-2017-18450 is a medium-severity vulnerability in Cpanel, classified under CWE-264. CVSS score: 4.5/10. Published 2019-08-02.
How severe is CVE-2017-18450?: Medium severity. CVSS v3 base score is 4.5 out of 10.