CVE-2024-10529

Executive Summary

CVE-2024-10529 is a Missing Authorization vulnerability in the Kognetiks Chatbot for WordPress plugin, affecting all versions up to and including 2.1.7. The flaw resides in the delete_assistant() function, which fails to perform a capability check before processing deletion requests. This allows authenticated attackers with Subscriber-level access or higher to delete GPT assistants without proper authorization.

The vulnerability is classified as Medium Severity (CVSS 5.3) and is specific to the WordPress ecosystem. No public exploit code or proof-of-concept is currently available, and the EPSS score is 0.0%, indicating a low probability of active exploitation in the wild. However, given the low privileges required and the potential for data loss, this issue should be addressed promptly.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository. Users who installed the plugin directly from the WordPress dashboard or via manual upload are affected. There is no known compromise of the plugin’s supply chain, but the lack of a patch from the vendor (Kognetiks) increases the risk for unmaintained installations.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
• Base Score: 5.3 (Medium)
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: Low (Subscriber-level)
• User Interaction: None
• Scope: Unchanged
• Confidentiality Impact: None
• Integrity Impact: Low (deletion of assistants)
• Availability Impact: None

Threat Level: Medium. While the impact is limited to integrity (deletion of data), the low barrier to entry (authenticated subscriber) makes this a viable target for malicious insiders or compromised accounts.

Deep Dive & Mechanics

The vulnerability exists in the delete_assistant() function, which is likely registered via a WordPress AJAX action or REST API endpoint. The function is intended to allow authorized users (e.g., administrators) to delete GPT assistants. However, the code does not include a call to current_user_can() or wp_verify_nonce() to enforce proper authorization.

Root Cause: Missing capability check. The function processes the deletion request without verifying that the current user has the required permissions (e.g., manage_options or edit_posts).

Attack Flow:

1. An attacker authenticates with a Subscriber-level account.
2. The attacker sends a crafted HTTP request (POST or GET) to the vulnerable endpoint, including the assistant ID to delete.
3. The server processes the request and deletes the assistant without checking the user’s capabilities.

Affected Component: delete_assistant() function in the Kognetiks Chatbot plugin.

WordPress Context: This is a WordPress plugin vulnerability. The issue is not related to the underlying web server (Apache/Nginx) but to the plugin’s failure to implement WordPress’s built-in authorization mechanisms.

Vulnerable vs. Patched Code

Since no patch is available, the vulnerable code is presumed to be:

// Vulnerable code (conceptual)
function delete_assistant() {
    $assistant_id = $_POST['assistant_id'];
    // Missing capability check
    // Missing nonce verification
    delete_assistant_from_database($assistant_id);
    wp_die();
}
add_action('wp_ajax_delete_assistant', 'delete_assistant');

Patched code (expected):

// Patched code (conceptual)
function delete_assistant() {
    // Verify nonce
    if (!wp_verify_nonce($_POST['_wpnonce'], 'delete_assistant_nonce')) {
        wp_die('Security check failed.');
    }
    // Check capability
    if (!current_user_can('manage_options')) {
        wp_die('You do not have permission to delete assistants.');
    }
    $assistant_id = sanitize_text_field($_POST['assistant_id']);
    delete_assistant_from_database($assistant_id);
    wp_die();
}
add_action('wp_ajax_delete_assistant', 'delete_assistant');

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• A WordPress site with Kognetiks Chatbot plugin <= 2.1.7 installed and activated.
• Valid credentials for a Subscriber-level account.

Exploitation Steps:

1. Identify the vulnerable endpoint:

   • The AJAX action is likely delete_assistant. The full URL would be:

     http://target.com/wp-admin/admin-ajax.php?action=delete_assistant
     

2. Craft the request:

   • Use a tool like curl or Burp Suite to send a POST request with the assistant ID.

   curl -X POST http://target.com/wp-admin/admin-ajax.php \
     -d "action=delete_assistant&assistant_id=123" \
     --cookie "wordpress_logged_in_xxx=session_cookie"
   

3. Verify deletion:

   • The assistant with ID 123 will be removed from the database.

Note: No public exploit code is available. The above is a conceptual demonstration.

Blue Team (Detection & Defense)

Detection:

• Monitor for AJAX requests to admin-ajax.php with the action=delete_assistant parameter from low-privileged users.
• Look for unusual patterns of assistant deletions in logs.

Defense:

• Immediately restrict access to the plugin’s AJAX endpoints via a Web Application Firewall (WAF) rule.
• Implement a temporary workaround by disabling the plugin’s AJAX actions for non-admin users using a custom plugin or code snippet.

Workaround Code (functions.php):

add_action('init', function() {
    if (is_user_logged_in() && !current_user_can('manage_options')) {
        remove_action('wp_ajax_delete_assistant', 'delete_assistant');
    }
});

Indicators of Compromise (IOCs)

• Network IOCs:

  • HTTP POST requests to /wp-admin/admin-ajax.php with body containing action=delete_assistant.
  • Repeated deletion requests from the same IP or user agent.

• Host IOCs:

  • Missing GPT assistant records in the database (table likely wp_kognetiks_assistants).
  • Log entries showing delete_assistant action performed by Subscriber-level users.

• File IOCs:

  • Modified or deleted plugin files (if attacker escalates privileges).

Detection Engineering

YARA Rule

rule Detect_Kognetiks_Chatbot_Delete_Assistant_Exploit {
    meta:
        description = "Detects attempts to exploit CVE-2024-10529 in Kognetiks Chatbot plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2024-10529"
    strings:
        $ajax_action = "delete_assistant"
        $admin_ajax = "admin-ajax.php"
    condition:
        $ajax_action and $admin_ajax
}

Sigma Rule

title: Kognetiks Chatbot Unauthorized Assistant Deletion
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects unauthorized deletion of GPT assistants via missing capability check in Kognetiks Chatbot plugin
author: Valters IT
date: 2025/04/10
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2024-10529
logsource:
    category: webserver
    product: apache
    service: access_combined
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: 'admin-ajax.php'
        cs-uri-query|contains: 'action=delete_assistant'
    condition: selection
falsepositives:
    - Legitimate admin actions (should be rare)
level: medium

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"CVE-2024-10529 Kognetiks Chatbot Unauthorized Assistant Deletion";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"admin-ajax.php"; http_uri;
    content:"action=delete_assistant"; http_client_body;
    classtype:attempted-admin;
    sid:1000001;
    rev:1;
    reference:cve,2024-10529;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin until a patch is released by Kognetiks.
2. Apply a WAF rule to block requests to admin-ajax.php with action=delete_assistant from non-admin users.
3. Audit user accounts for any unauthorized assistant deletions.

Long-term Fix:

• The vendor must release a patched version that includes proper capability checks and nonce verification in the delete_assistant() function.
• Users should update to the latest version once available.

Workaround:

• Add the following code to the theme’s functions.php to restrict the AJAX action:

add_action('wp_ajax_delete_assistant', function() {
    if (!current_user_can('manage_options')) {
        wp_die('Unauthorized.');
    }
}, 0);

Valters IT
Senior DevSecOps & Cyber Threat Intelligence Expert