CVE-2024-32719

Executive Summary

CVE-2024-32719 is a Missing Authorization vulnerability in the WP Club Manager WordPress plugin, affecting versions from n/a through 2.2.11. This flaw allows unauthenticated attackers to access sensitive data or perform unauthorized actions due to missing capability checks on certain plugin endpoints. The CVSS score is 5.3 (Medium), with a low EPSS score of 0.0%, indicating low exploitation activity at the time of analysis. No public proof-of-concept or patch details are currently available.

Supply Chain & Package Security

This vulnerability affects the WordPress plugin ecosystem. WP Club Manager is distributed via the official WordPress plugin repository. Users should verify plugin integrity by checking checksums and monitoring for suspicious updates. No known supply chain compromise has been reported.

CVSS Breakdown & Threat Level

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

The vulnerability is exploitable remotely without authentication, but only leads to limited information disclosure. The low EPSS score suggests active exploitation is unlikely in the near term.

Deep Dive & Mechanics

The WP Club Manager plugin fails to properly enforce authorization checks on certain REST API endpoints or AJAX actions. This allows unauthenticated users to access club member data, match schedules, or other sensitive information that should require administrative or editor-level privileges.

The missing authorization likely stems from improper use of current_user_can() checks or missing nonce verification in plugin hooks. Attackers can craft HTTP requests to these unprotected endpoints to retrieve data without authentication.

Vulnerable vs. Patched Code

Since no patch is available, the vulnerable code pattern is described generically:

Vulnerable Code (wp-club-manager/includes/class-wpcm-ajax.php):

add_action('wp_ajax_nopriv_wpcm_get_members', 'wpcm_get_members');
function wpcm_get_members() {
    // Missing capability check
    $members = get_posts(array('post_type' => 'wpcm_member'));
    wp_send_json($members);
}

Patched Code (hypothetical):

add_action('wp_ajax_nopriv_wpcm_get_members', 'wpcm_get_members');
function wpcm_get_members() {
    if (!current_user_can('edit_posts')) {
        wp_die('Unauthorized', 403);
    }
    $members = get_posts(array('post_type' => 'wpcm_member'));
    wp_send_json($members);
}

Exploitation & Lab Setup

Red Team

1. Reconnaissance: Identify WordPress sites running WP Club Manager <= 2.2.11 using Shodan dorks or WPScan.
2. Endpoint Discovery: Enumerate AJAX actions or REST endpoints (e.g., /wp-admin/admin-ajax.php?action=wpcm_get_members).
3. Exploitation: Send unauthenticated GET requests to unprotected endpoints:

   curl -X GET "http://target/wp-admin/admin-ajax.php?action=wpcm_get_members"
   

4. Data Extraction: Parse JSON response for sensitive member data.

Blue Team

1. Detection: Monitor for unusual AJAX requests to admin-ajax.php with action parameters related to WP Club Manager from unauthenticated sources.
2. Honeypot: Deploy a fake WP Club Manager endpoint to capture attacker behavior.
3. Blocking: Use WAF rules to block requests to admin-ajax.php with action parameters not preceded by a valid nonce.

Indicators of Compromise (IOCs)

• Network: HTTP requests to /wp-admin/admin-ajax.php with action=wpcm_* parameters from unauthenticated IPs.
• Logs: WordPress debug logs showing wp_ajax_nopriv_* actions being triggered without authentication.
• File: Modified or unexpected files in /wp-content/plugins/wp-club-manager/ directory.

Detection Engineering

YARA Rule

rule CVE_2024_32719_WP_Club_Manager_Missing_Auth {
    meta:
        description = "Detects exploitation attempts for CVE-2024-32719 in WP Club Manager"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2024-32719"
    strings:
        $ajax_action = "wpcm_" ascii wide nocase
        $admin_ajax = "admin-ajax.php" ascii wide nocase
    condition:
        $admin_ajax and $ajax_action
}

Sigma Rule

title: CVE-2024-32719 WP Club Manager Missing Authorization
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects unauthenticated AJAX requests to WP Club Manager endpoints
author: Valters IT
date: 2025/04/10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'GET'
        cs-uri-query|contains: 'admin-ajax.php'
        cs-uri-query|contains: 'action=wpcm_'
    condition: selection
falsepositives:
    - Legitimate admin actions with valid nonces
level: medium

Suricata Rule

alert http any any -> any any (msg:"CVE-2024-32719 WP Club Manager Missing Authorization Attempt"; flow:to_server; content:"GET"; http_method; content:"admin-ajax.php"; http_uri; content:"action=wpcm_"; http_uri; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate: Disable the WP Club Manager plugin until a patch is available.
2. Short-term: Implement a WAF rule to block unauthenticated requests to admin-ajax.php with action parameters starting with wpcm_.
3. Long-term: Apply the vendor patch when released, or manually add capability checks to all AJAX handlers in the plugin.
4. Monitoring: Enable detailed logging for AJAX requests and review for suspicious activity.

Valters IT
Securing Digital Frontiers