CVE-2025-49287

Executive Summary

CVE-2025-49287 is a Missing Authorization vulnerability in the WordPress plugin Product Feed for WooCommerce by WebToffee, affecting versions up to and including 2.2.8. This flaw allows an unauthenticated attacker to exploit incorrectly configured access control security levels, potentially leading to unauthorized access to product feed data or configuration changes. The vulnerability has a CVSS score of 4.3 (Medium) and an EPSS score of 0.0%, indicating low exploitation probability currently. No public proof-of-concept or patch is available at this time.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository. Users are advised to monitor the plugin’s update channel and apply any security patches as soon as they become available. Since the plugin is part of the WordPress ecosystem, supply chain risks include compromised updates or malicious forks.

CVSS Breakdown & Threat Level

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

The threat level is Medium due to low complexity and no required privileges, but the impact is limited to integrity only.

Deep Dive & Mechanics

The vulnerability resides in the Product Feed for WooCommerce plugin’s authorization checks. The plugin fails to properly validate user permissions when accessing certain administrative endpoints or AJAX actions. This allows an unauthenticated attacker to:

• Modify product feed settings
• Access or delete feed configurations
• Potentially inject malicious data into feed outputs

The root cause is a missing current_user_can() check or similar capability verification in functions handling feed management requests.

Vulnerable vs. Patched Code

Vulnerable Code (<= 2.2.8):

function handle_feed_action() {
    // Missing capability check
    $feed_id = $_POST['feed_id'];
    // Process action without verifying user permissions
    update_option('feed_config_' . $feed_id, $_POST['config']);
}

Patched Code (Hypothetical):

function handle_feed_action() {
    if (!current_user_can('manage_options')) {
        wp_die('Unauthorized');
    }
    $feed_id = $_POST['feed_id'];
    // Process action after verifying user permissions
    update_option('feed_config_' . $feed_id, $_POST['config']);
}

Exploitation & Lab Setup

Red Team

1. Setup: Install WordPress with WooCommerce and Product Feed for WooCommerce <= 2.2.8.
2. Exploit: Send a crafted HTTP POST request to the vulnerable endpoint without authentication:

   POST /wp-admin/admin-ajax.php HTTP/1.1
   Host: target-site.com
   Content-Type: application/x-www-form-urlencoded
   
   action=wpf_feed_action&feed_id=1&config=malicious_data
   

3. Result: The feed configuration is modified without authorization.

Blue Team

1. Detection: Monitor for unauthorized access to /wp-admin/admin-ajax.php with parameters like action=wpf_feed_action.
2. Mitigation: Implement a Web Application Firewall (WAF) rule to block requests to admin-ajax.php without a valid nonce or authentication cookie.
3. Harden: Disable the plugin until a patch is available, or apply a custom capability check via a code snippet.

Indicators of Compromise (IOCs)

• Network: HTTP requests to /wp-admin/admin-ajax.php with action=wpf_feed_action from unauthenticated sources.
• File: Unexpected modifications to WordPress options table entries like feed_config_*.
• Log: WordPress debug log entries showing unauthorized access attempts to feed management functions.

Detection Engineering

YARA Rule

rule CVE_2025_49287_WordPress_Plugin
{
    meta:
        description = "Detects exploitation attempts for CVE-2025-49287 in Product Feed for WooCommerce"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-49287"
    strings:
        $action = "wpf_feed_action"
        $feed_id = "feed_id"
    condition:
        all of them
}

Sigma Rule

title: CVE-2025-49287 Exploitation Attempt
id: 12345678-1234-1234-1234-123456789abc
status: experimental
description: Detects HTTP requests targeting the vulnerable admin-ajax.php endpoint
author: Valters IT
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: 'admin-ajax.php'
        cs-uri-query|contains: 'action=wpf_feed_action'
    condition: selection
falsepositives:
    - Legitimate admin actions (requires authentication)
level: medium

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-49287 Exploitation Attempt"; flow:to_server; content:"POST"; http_method; content:"admin-ajax.php"; http_uri; content:"action=wpf_feed_action"; http_client_body; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

1. Immediate: Disable the plugin if not essential, or restrict access to /wp-admin/admin-ajax.php via .htaccess or WAF rules.
2. Short-term: Monitor the WebToffee plugin page for updates and apply the patch as soon as it is released.
3. Long-term: Implement a WordPress security plugin that adds additional authorization checks for AJAX actions.
4. Workaround: Add a custom capability check to the plugin’s functions using a code snippet in the theme’s functions.php file.

Valters IT
Securing Digital Frontiers