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  • Guide to WHM Plugins - Plugin Files
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WHM includes specific requirements for plugin interfaces and other files.



WHM plugins can include many different types of files. Your installation script should use the following locations to store your plugins' files:

Interface files

Your installation script should store interface files in a subdirectory of the /usr/local/cpanel/whostmgr/docroot/templates/ directory.

  • In cPanel & WHM version 66 and later, WHM plugin interfaces that perform ACL checks must include an additional module. For more information, read our Guide to WHM Plugins - ACL Reference Chart documentation. 
  • In cPanel & WHM version 64, we implemented a wrapper system that plugin developers can access in their custom interfaces.
    • We strongly recommend that you use WHM's master template and wrappers to match the look and feel of WHM's existing interfaces. For more information about WHM's master template, header, and footer, read our Guide to WHM Plugins - Interfaces documentation.
    • We strongly recommend that you use Template Toolkit to create your plugin's interfaces. 
    • For steps to create a custom WHM interface in Template Toolkit, read our Create a New WHM Interface in Template Toolkit tutorial.
  • cPanel plugin requirements and WHM plugin requirements are not identical. For information about cPanel plugins, read our Guide to cPanel Plugins documentation.
  • For resources that help you match custom interfaces to the WHM interface, read our experimental  User Interface Style Guide.


Your installation script should store icons in the /usr/local/cpanel/whostmgr/docroot/addon_plugins/ directory.

  • When you register your plugin, the AppConfig configuration file automatically adds your plugin's icon to the WHM interface.
  • We strongly recommend that you use 48x48 .png images with a transparent background.
  • Image files must use a supported image file type (.gif.jpeg, or .png).

CGI scripts

Your installation script should store CGI scripts in the  /usr/local/cpanel/whostmgr/docroot/cgi/ directory.

  • For plugins with a single CGI file, use the addon_name.cgi naming convention for CGI scripts, where name represents your plugin's name.
  • For plugins with multiple CGI files, store them in a subdirectory within the /usr/local/cpanel/whostmgr/docroot/cgi directory.

WHMADDON and ACLS comments

CGI scripts can include two special comment lines that provide additional plugin information to WHM.

  • The WHMADDON comment creates an entry for the plugin in WHM's left navigation menu. This comment line must use the following format:

    #WHMADDON:plugin_name:Display Name:icon.png

    In this example, plugin_name represents the plugin's name, Display Name represents the plugin's display name, and icon.png represents the plugin's icon file.

  • The ACLS comment determines the Access Control Lists (ACLs) that the plugin requires in order to display in WHM's left navigation menu. This comment line must use the following format:


    In this example, all represents a list of ACLs that the plugin requires. For a complete list of ACLs, read our Guide to WHM Plugins - ACL Reference Chart documentation.


#WHMADDON:example:Example WHM Plugin:example.png

use strict;
 package cgi::examplePlugin;
 use warnings;
 use Cpanel::Template                  ();

 # Make the script into a modulino, to facilitate testing.
 run() unless caller();

 sub run {
     print "Content-type: text/html\r\n\r\n";
             'template_file' => 'whm_example_plugin/index.tmpl',
             'print'         => 1,

Other files

Your installation script should store other plugin files in a subdirectory of the /usr/local/cpanel/3rdparty/ directory.

When files exist in this directory, WHM users with the correct permissions can access them via a URL. For example, WHM users on the server could access the /usr/local/cpanel/3rdparty/myplugin/index.html file via the following URL: