Multiple Post Thumbnails

All output should be run through an escaping function (see the Security sections in the WordPress Developer Handbooks), found '"<script>var post_id = $post_id;</script>"'.

A function call to __() with texts containing placeholders was found, but was not accompanied by a "translators:" comment on the line above to clarify the meaning of the placeholders.

Processing form data without nonce verification.

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.

Processing form data without nonce verification.

Detected usage of a possibly undefined superglobal array index: $_POST[&#039;post_id&#039;]. Check that the array index exists before using it.

Function "get_upload_iframe_src()" requires WordPress 3.0.0, but your plugin minimum supported version is WordPress 2.9.2.

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().

Simple placeholders should not be quoted in the query string in $wpdb->prepare(). Found: '%s'.

trigger_error() found. Debug code should not normally be used in production.

parse_url() is discouraged because of inconsistency in the output across PHP versions; use wp_parse_url() instead.

The $text parameter must be a single text string literal. Found: $this->label

Multiple placeholders in translatable strings should be ordered. Expected "%1\$s, %2\$s", but got "%s, %s" in "The 'label' and 'id' values of the 'args' parameter of '%s::%s()' are required".

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

Tested up to: 5.0 < 7.0. The "Tested up to" value in your plugin is not set to the current version of WordPress. This means your plugin will not show up in searches, as we require plugins to be compatible and documented as tested up to the most recent version of WordPress.

Missing "License" in Plugin Header. Please update your Plugin Header with a valid GPLv2 (or later) compatible license.