CVE-2017-18420: cPanel

Medium severity, CVSS 5.4. EPSS: 0.5% chance of exploitation in the next 30 days.

cPanel before 66.0.2 allows stored XSS during WHM cPAddons processing (SEC-269).

Affected products

• cPanel cPanel: before 66.0.2 (fixed in 66.0.2)

Published 2019-08-02. Last modified 2026-06-17.