What is CVE-2018-20909?

CVE-2018-20909 is a high-severity vulnerability in Cpanel, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.1/10. Published 2019-08-01.

How severe is CVE-2018-20909?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in Cpanel

CVE-2018-20909

cPanel before 70.0.23 allows arbitrary file-chmod operations during legacy incremental backups (SEC-338).

Published 2019-08-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (24.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.4% 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-732 — Incorrect Permission Assignment for Critical Resource

References

documentation.cpanel.net/display/CL/70+Change+Log (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2018-20909?: CVE-2018-20909 is a high-severity vulnerability in Cpanel, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.1/10. Published 2019-08-01.
How severe is CVE-2018-20909?: High severity. CVSS v3 base score is 7.1 out of 10.