CVE-2024-49687

Executive Summary

CVE-2024-49687 is a Missing Authorization vulnerability in the WordPress plugin Smart Manager (smart-manager-for-wp-e-commerce) by Storeapps, affecting versions up to and including 8.45.0. This flaw allows an unauthenticated attacker to bypass authorization checks, potentially leading to unauthorized access to sensitive data or administrative functions. The vulnerability has a CVSS score of 4.3 (Medium) and an EPSS score of 0.0%, indicating low exploitation likelihood at this time. No public proof-of-concept or patch details are currently available.

WordPress Ecosystem Context

This vulnerability is specific to the WordPress plugin ecosystem. It does not affect Apache, Nginx, or core WordPress files. The issue lies within the plugin's authorization logic, which fails to properly verify user capabilities before granting access to certain actions or data.

CVSS Breakdown & Threat Level

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

The low EPSS score (0.0%) suggests that exploitation is not currently widespread, but the lack of a patch and the potential for unauthorized data modification make this a significant concern for affected sites.

Deep Dive & Mechanics

The vulnerability resides in the Smart Manager plugin's AJAX handlers or REST API endpoints. The plugin fails to enforce proper capability checks (e.g., current_user_can() or wp_verify_nonce()) before executing sensitive operations. An unauthenticated attacker can craft HTTP requests to these endpoints, bypassing authentication and authorization checks.

Root Cause: The plugin uses wp_ajax_* hooks without verifying user permissions, or it relies on insufficient checks that can be bypassed. This allows attackers to modify product data, settings, or other managed entities without proper credentials.

Attack Vector: The attacker sends a crafted HTTP POST/GET request to the vulnerable endpoint, such as /wp-admin/admin-ajax.php?action=smart_manager_*, with malicious parameters. Since no authentication is required, the request is processed, leading to unauthorized actions.

Vulnerable vs. Patched Code

Since no patch is available, the following is a hypothetical comparison based on common authorization fixes:

Vulnerable Code (<= 8.45.0):

add_action('wp_ajax_smart_manager_update_product', 'smart_manager_update_product_callback');
function smart_manager_update_product_callback() {
    // No capability check
    $product_id = $_POST['product_id'];
    $new_price = $_POST['new_price'];
    update_post_meta($product_id, '_price', $new_price);
    wp_die();
}

Patched Code (Hypothetical):

add_action('wp_ajax_smart_manager_update_product', 'smart_manager_update_product_callback');
function smart_manager_update_product_callback() {
    // Verify nonce and user capability
    if (!wp_verify_nonce($_POST['_wpnonce'], 'smart_manager_nonce') || !current_user_can('manage_woocommerce')) {
        wp_die('Unauthorized');
    }
    $product_id = intval($_POST['product_id']);
    $new_price = sanitize_text_field($_POST['new_price']);
    update_post_meta($product_id, '_price', $new_price);
    wp_die();
}

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• Target WordPress site with Smart Manager plugin <= 8.45.0
• Network access to the site

Exploitation Steps:

1. Identify vulnerable endpoints by analyzing the plugin's AJAX actions (e.g., smart_manager_update_product, smart_manager_delete_item).
2. Craft a request without authentication:

   curl -X POST https://target.com/wp-admin/admin-ajax.php \
     -d "action=smart_manager_update_product&product_id=123&new_price=0.01"
   

3. Verify unauthorized modification (e.g., product price changed to $0.01).

Note: No public exploit code is available; this is a conceptual demonstration.

Blue Team (Detection & Defense)

Detection:

• Monitor for unusual AJAX requests to /wp-admin/admin-ajax.php with action parameters starting with smart_manager_ from unauthenticated users.
• Look for rapid changes to product metadata (e.g., price, stock) without corresponding admin session.

Defense:

• Immediately disable or remove the Smart Manager plugin until a patch is released.
• Implement Web Application Firewall (WAF) rules to block requests to known vulnerable endpoints.
• Use WordPress security plugins to enforce additional authentication checks.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP POST requests to /wp-admin/admin-ajax.php with action=smart_manager_* parameters from unauthenticated sources.
  • Unusual patterns in product metadata changes (e.g., multiple products updated in short time).
• File IOCs:
  • Modified plugin files (e.g., wp-content/plugins/smart-manager-for-wp-e-commerce/).
  • Suspicious log entries in WordPress debug logs.
• Behavioral IOCs:
  • Unauthorized price changes, product deletions, or inventory modifications.

Detection Engineering

YARA Rule

rule CVE_2024_49687_Smart_Manager_Unauth {
    meta:
        description = "Detects Smart Manager plugin files vulnerable to CVE-2024-49687"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2024-49687"
    strings:
        $vuln_func = "wp_ajax_smart_manager" nocase
        $no_check = "current_user_can" nocase
    condition:
        $vuln_func and not $no_check
}

Sigma Rule

title: CVE-2024-49687 Smart Manager Unauthorized Access
id: 8a3f7c2e-5d1b-4a9f-8c6e-2b1a3d4f5e6c
status: experimental
description: Detects unauthorized AJAX requests to Smart Manager plugin endpoints
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: '/wp-admin/admin-ajax.php'
        cs-uri-query|contains: 'action=smart_manager_'
        sc-status: 200
    condition: selection
falsepositives:
    - Legitimate admin actions (requires correlation with authentication)
level: high

Suricata Rule

alert http any any -> $HOME_NET any (
    msg:"CVE-2024-49687 Smart Manager Unauthorized AJAX Request";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"/wp-admin/admin-ajax.php"; http_uri;
    content:"action=smart_manager_"; http_client_body;
    classtype:attempted-admin;
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin until a patch is released by Storeapps.
2. Implement virtual patching via WAF rules to block requests to /wp-admin/admin-ajax.php with action=smart_manager_* from unauthenticated users.
3. Audit user accounts for any unauthorized changes made before detection.

Long-term Fix:

• Apply the official patch from Storeapps once available (monitor their changelog).
• Update to the latest version of the plugin (if a patched version > 8.45.0 is released).
• Enforce principle of least privilege for all WordPress users.

Workarounds:

• Use a WordPress security plugin (e.g., Wordfence) to add extra authentication checks.
• Restrict access to /wp-admin/admin-ajax.php via .htaccess for non-admin IPs.

Valters IT
DevSecOps & Cyber Threat Intelligence