MC4WP: Mailchimp for WordPress

Global variables defined by a theme/plugin should start with the theme/plugin prefix. Found: "$api_v3".

$_COOKIE[$name] not unslashed before sanitization. Use wp_unslash() or similar

Detected usage of a non-sanitized input variable: $_COOKIE[$name]

Processing form data without nonce verification.

Functions declared in the global namespace by a theme/plugin should start with the theme/plugin prefix. Found: "_mc4wp_400_find_group_for_interest".

Processing form data without nonce verification.

Detected usage of a possibly undefined superglobal array index: $_GET['mc4wp_preview_form']. Check that the array index exists before using it.

The use of function ini_set() is discouraged

Use of a direct database call is discouraged.

Direct database call without caching detected. Consider using wp_cache_get() / wp_cache_set() or wp_cache_delete().

wp_redirect() found. Using wp_safe_redirect(), along with the "allowed_redirect_hosts" filter if needed, can help avoid any chances of malicious redirects within code. It is also important to remember to call exit() after a redirect so that no other unwanted code is executed.

The plugin name includes a restricted term. Your chosen plugin name - "MC4WP: Mailchimp for WordPress" - contains the restricted term "wordpress" which cannot be used at all in your plugin name.

Resource version not set in call to wp_enqueue_script(). This means new versions of the script may not always be loaded due to browser caching.

In footer ($in_footer) is not set explicitly wp_enqueue_script; It is recommended to load scripts in the footer. Please set this value to `true` to load it in the footer, or explicitly `false` if it should be loaded in the header.

Using exclusionary parameters, like exclude, in calls to get_posts() should be done with caution, see https://wpvip.com/documentation/performance-improvements-by-removing-usage-of-post__not_in/ for more information.

PHP file should prevent direct access. Add a check like: if ( ! defined( 'ABSPATH' ) ) exit;