What is CVE-2017-18451?

CVE-2017-18451 is a medium-severity vulnerability in Cpanel, classified under CWE-264. CVSS score: 5.3/10. Published 2019-08-02.

How severe is CVE-2017-18451?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Cpanel

CVE-2017-18451

cPanel before 64.0.21 allows attackers to read a user's crontab file during a short time interval upon a cPAddon upgrade (SEC-257).

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

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.2% 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-264

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-2017-18451?: CVE-2017-18451 is a medium-severity vulnerability in Cpanel, classified under CWE-264. CVSS score: 5.3/10. Published 2019-08-02.
How severe is CVE-2017-18451?: Medium severity. CVSS v3 base score is 5.3 out of 10.