What is CVE-2018-20884?

CVE-2018-20884 is a medium-severity vulnerability in Cpanel, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-08-01.

How severe is CVE-2018-20884?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Cpanel

CVE-2018-20884

cPanel before 74.0.0 allows stored XSS in the WHM File Restoration interface (SEC-367).

Vulnerability class: XSS (Cross-Site Scripting)

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

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (41.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 41.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Cpanel

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

documentation.cpanel.net/display/CL/74+Change+Log (Product, Release Notes)

Frequently asked questions

What is CVE-2018-20884?: CVE-2018-20884 is a medium-severity vulnerability in Cpanel, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2019-08-01.
How severe is CVE-2018-20884?: Medium severity. CVSS v3 base score is 5.4 out of 10.