In light of recent advancements, it becomes crucial to maintain the security of the websites and web applications we use. Unfortunately, vulnerabilities and exploits are becoming increasingly sophisticated and targeted by attackers to exploit known weaknesses in a system. This post aims to discuss a vulnerability recently found within the Thank You Page Customizer for WooCommerce – Increase Your Sales plugin for WordPress.

Summary

This vulnerability, labeled as CVE-2024-1687, affects the Thank You Page Customizer for WooCommerce – Increase Your Sales plugin for WordPress. It allows unauthorized execution of shortcodes due to a missing capability check in the get_text_editor_content() function. This vulnerability affects all versions up to, and including, 1.1.2, making it possible for authenticated attackers with subscriber-level access and above to execute arbitrary shortcodes.

Code Snippet

The missing capability check lies in the get_text_editor_content() function in the affected version of the plugin. Essentially, this function is responsible for handling requests for the plugin's text editor, but without checking user permissions. Here's a simplified example of the vulnerable function:

function get_text_editor_content() {
    // Extracting $_POST data
    $parsed_post = intval($_POST['post_id']);

    // Fetching the content
    $post_object = get_post($parsed_post);

    // Sending the content to be displayed in the editor
    wp_send_json_success($post_object->post_content);
}

As the code snippet demonstrates, the vulnerable function processes POST data and then fetches content based on provided input. However, no checks are in place to verify the user capabilities or permissions, ultimately allowing malicious users to execute arbitrary shortcodes.

Exploiting CVE-2024-1687

By exploiting this vulnerability, an attacker with subscriber-level access can easily cover their tracks while running arbitrary code snippets.

They craft a malicious shortcode with arbitrary actions to be executed on the server.

3. They call the get_text_editor_content() function with the malicious shortcode as POST data through an AJAX request.

Original References

Link 1: WordPress.org Plugin Repository

Link 2: Thank You Page Customizer for WooCommerce – Increase Your Sales Plugin Homepage

Link 3: CVE Details - CVE-2024-1687 Information

Conclusion

This vulnerability signifies the importance of maintaining code security standards. Vulnerabilities such as CVE-2024-1687, which allow unauthorized execution of shortcodes, can severely compromise a WordPress site and potentially impact business reputations.

As of now, make sure to update the Thank You Page Customizer for WooCommerce – Increase Your Sales plugin to the latest version, which addresses this vulnerability. Plugin authors and developers should always aim to implement proper permission checks and perform regular code reviews for potential security flaws.

Timeline

Published on: 02/27/2024 06:15:45 UTC
Last modified on: 02/27/2024 14:20:06 UTC