CVE-2025-23166 cPanel CVE debrief

Who should care

cPanel/WHM administrators and hosting operators who deploy or maintain EasyApache 4, especially systems using NodeJS 20 or NodeJS 22 packages.

Technical summary

According to the vendor release note, EasyApache 4 25.16 delivers updated packages and includes security fixes for NodeJS 20 and NodeJS 22 tied to CVE-2025-23166. No additional technical details about the vulnerability are provided in the supplied corpus. The advisory is package-focused rather than application-behavior-focused, so remediation is centered on applying the updated EasyApache 4 packages.

Defensive priority

Medium priority for environments using EasyApache 4 NodeJS 20 or 22; prioritize prompt maintenance if those packages are installed.

Recommended defensive actions

• Review whether any cPanel/WHM servers use EasyApache 4 NodeJS 20 or NodeJS 22.
• Apply the EasyApache 4 25.16 updates from the vendor source.
• Confirm that the updated NodeJS packages are installed on all affected servers.
• Track related EasyApache 4 package updates referenced by the same release note, including Ruby Rack, Tomcat 10.1, and APR.
• Revalidate server maintenance procedures so future EasyApache 4 package security updates are deployed quickly.

Evidence notes

The vendor-official EasyApache 4 25.16 release note explicitly states that it includes security updates for NodeJS 20 and NodeJS 22 to address CVE-2025-23166. The supplied material does not include CVSS, exploitability details, affected versions beyond the NodeJS package streams named in the note, or any CVE publication/modification timestamps.

Official resources