danpowellbvm

I found a temporary fix.

• Copy the below code into a text editor
• Save the file as block-verification.php
• Upload to WP Plugins directory
• Activate the plugin in WP Admin

The plugin blocks dropboxusercontent links and thinkupverification scripts

<?php
/**

Plugin Name: Block External Scripts and Connections

Description: Blocks specified scripts, network connections, and references to external domains on both frontend and backend.

Version: 1.2

Author: Your Name
*/

if (!defined('ABSPATH')) {
exit; // Exit if accessed directly.
}

class BlockExternalScripts {

public function __construct() {
    // Block scripts on the frontend.
    add_action('wp_enqueue_scripts', [$this, 'block_scripts'], 9999);

    // Block scripts in the backend.
    add_action('admin_enqueue_scripts', [$this, 'block_scripts'], 9999);

    // Block external HTTP requests for all requests.
    add_filter('http_request_host_is_external', [$this, 'block_external_requests'], 10, 3);

    // Disable DNS prefetching for specified domains on frontend.
    add_filter('wp_resource_hints', [$this, 'remove_dns_prefetch'], 10, 2);

    // Filter database content output on both frontend and backend.
    add_filter('the_content', [$this, 'filter_database_content']);
    add_filter('the_excerpt', [$this, 'filter_database_content']);
    add_filter('widget_text', [$this, 'filter_database_content']);
    add_filter('editor_content', [$this, 'filter_database_content'], 10); // For the block editor.
    add_filter('admin_post_thumbnail_html', [$this, 'filter_database_content']); // Featured image HTML.

    // Block themes from referencing the domains.
    add_action('after_setup_theme', [$this, 'block_theme_references']);
}

/**
 * Block specific scripts from being enqueued.
 */
public function block_scripts() {
    wp_dequeue_script('thinkupverification-js');
    wp_deregister_script('thinkupverification-js');

    wp_dequeue_script('thinkupverification');
    wp_deregister_script('thinkupverification');
}

/**
 * Block external HTTP requests to specific domains.
 *
 * @param bool $is_external Whether the host is external.
 * @param string $host The hostname.
 * @param string $url The full URL.
 * @return bool False if the request should be blocked.
 */
public function block_external_requests($is_external, $host, $url) {
    $blocked_domains = [
        'dl.dropboxusercontent.com',
        'dropboxusercontent.com'
    ];

    if (in_array($host, $blocked_domains, true)) {
        return false;
    }

    return $is_external;
}

/**
 * Remove DNS prefetching for blocked domains.
 *
 * @param array $urls Array of resource hints.
 * @param string $relation_type The type of relation (e.g., 'dns-prefetch').
 * @return array Filtered resource hints.
 */
public function remove_dns_prefetch($urls, $relation_type) {
    if ('dns-prefetch' === $relation_type) {
        $blocked_domains = [
            'dl.dropboxusercontent.com',
            'dropboxusercontent.com'
        ];

        foreach ($blocked_domains as $domain) {
            $prefetch_url = '//' . $domain;
            $key = array_search($prefetch_url, $urls);
            if (false !== $key) {
                unset($urls[$key]);
            }
        }
    }

    return $urls;
}

/**
 * Filter content from the database to remove references to blocked domains.
 *
 * @param string $content The post content or widget text.
 * @return string Filtered content.
 */
public function filter_database_content($content) {
    $blocked_domains = [
        'dl.dropboxusercontent.com',
        'dropboxusercontent.com'
    ];

    foreach ($blocked_domains as $domain) {
        $content = str_replace($domain, '[blocked]', $content);
    }

    return $content;
}

/**
 * Block themes from referencing blocked domains.
 */
public function block_theme_references() {
    add_filter('theme_mod_header_image', [$this, 'block_theme_mod_references']);
    add_filter('theme_mod_background_image', [$this, 'block_theme_mod_references']);
}

/**
 * Remove blocked domain references from theme mods.
 *
 * @param string $url The URL of the theme mod.
 * @return string Filtered URL.
 */
public function block_theme_mod_references($url) {
    $blocked_domains = [
        'dl.dropboxusercontent.com',
        'dropboxusercontent.com'
    ];

    foreach ($blocked_domains as $domain) {
        if (strpos($url, $domain) !== false) {
            return ''; // Remove the reference entirely.
        }
    }

    return $url;
}

}

new BlockExternalScripts();

Hi, thanks for the reply. The problem seems to have gone away. An hour ago I still had the problem (with Jetpack version 13.1.1 installed).

After reading your last message, I wanted to check to see if it was another plugin causing the problem so I tried disabling all plugins (except Jetpack) and this time the problem went away.

I enabled all plugins and the problem has not come back.

Thanks for helping with the issue, I will close this thread and mark it as resolved. If the issue comes back, I’ll use the link you provided.

Thanks

Dan

Hi, thanks for the reply. I’m still experiencing the issue.

My site is https://www.bvm.co.uk/

Thanks

Its stopped working completely.

The plugin says:

19Thumbnails disabled

9Thumbnails will be generated

All 28 images are being generated.

Normally resetting the settings fixes the issue. Today its completely stopped working.

Hi

Thanks for the reply. I’ve double checked and and remote diagnostics is enabled.

Im using Plesk as my webserver. I cant find where to add a rule to allow the webhook.

Under “Firewall“, Add custom Rule, I can add ports and IP addresses.
Under “Web Application Firewall (ModSecurity)” I can switch off rules using IDs and there is a “Regular expressions in rule messages” textbox.

This morning I deleted then reinstalled the plugin. 153 products synced, then it stopped.

I found this in the mod security log.

(32)Broken pipe: mod_fcgid: ap_pass_brigade failed in handle_request_ipc function, referer: https://www.bvm.co.uk/wp-admin/admin.php?page=mailchimp-woocommerce&tab=sync

thanks

Dan

Hi Albert. Thanks for the reply. I will keep an eye our for the update.

thanks

Dan

Hi, thanks for the reply. I disabled all plugins except Woocommerce and the problem went away. I could see the missing categories.

I enabled plugins a few at a time, with all plugins re-activated the problem seems to have gone away.

I will do some more testing over the weekend.

thanks

Dan

Hi

The update fixed the problem.

Many Thanks

Dan