CVE-2025-57917

Executive Summary

CVE-2025-57917 is a Missing Authorization vulnerability in the Printcart Web to Print Product Designer for WooCommerce plugin (printcart-integration) for WordPress. This flaw allows an unauthenticated attacker to exploit incorrectly configured access control security levels, potentially leading to unauthorized access to sensitive data or functionality. The vulnerability affects all versions up to and including 2.4.8. As of this report, no official patch is available, and no public proof-of-concept (PoC) or exploit code has been released. The EPSS score is 0.0%, indicating a very low probability of exploitation in the wild at this time.

Supply Chain & Package Security

This vulnerability resides in a WordPress plugin ecosystem. The plugin is distributed via the official WordPress plugin repository and potentially through third-party marketplaces. Users are advised to verify the integrity of their plugin installation and monitor for any unauthorized modifications. Since no patch is available, the supply chain risk is elevated for any site using this plugin.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
• Base 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: Low (C:L)
• Integrity Impact: None (I:N)
• Availability Impact: None (A:N)

Threat Level: Medium. The vulnerability is easy to exploit remotely without authentication, but the impact is limited to low confidentiality loss. No integrity or availability impact is expected.

Deep Dive & Mechanics

The vulnerability stems from a Missing Authorization check (CWE-862) in the Printcart plugin's REST API endpoints or AJAX handlers. The plugin likely fails to verify that the current user has the necessary permissions (e.g., manage_options or edit_posts) before executing sensitive operations. This allows any unauthenticated visitor to trigger actions that should be restricted to administrators or shop managers.

Root Cause Analysis:

• The plugin registers custom REST API routes or WordPress AJAX actions without implementing proper capability checks.
• An attacker can send crafted HTTP requests to these endpoints to retrieve order data, product designs, or configuration settings.
• The vulnerability is present in all versions <= 2.4.8, suggesting a fundamental design flaw rather than a recent regression.

Attack Scenario:

1. An attacker identifies a WordPress site running the vulnerable Printcart plugin.
2. The attacker sends a GET request to a vulnerable endpoint (e.g., /wp-json/printcart/v1/orders or admin-ajax.php?action=printcart_get_designs).
3. The server processes the request without checking user permissions, returning sensitive data.
4. The attacker exfiltrates the data for further exploitation or sale.

Vulnerable vs. Patched Code

Since no patch is available, a comparison cannot be made. However, based on the CWE, the vulnerable code likely resembles:

// Vulnerable: No capability check
add_action('wp_ajax_nopriv_printcart_get_data', 'printcart_get_data_handler');
function printcart_get_data_handler() {
    // Process request without checking user permissions
    $data = get_sensitive_data();
    wp_send_json_success($data);
}

A patched version would include:

// Patched: Capability check added
add_action('wp_ajax_printcart_get_data', 'printcart_get_data_handler');
add_action('wp_ajax_nopriv_printcart_get_data', 'printcart_get_data_handler');
function printcart_get_data_handler() {
    if (!current_user_can('manage_options')) {
        wp_die('Unauthorized', 403);
    }
    $data = get_sensitive_data();
    wp_send_json_success($data);
}

Exploitation & Lab Setup

Red Team

Prerequisites:

• A WordPress instance with Printcart plugin version <= 2.4.8 installed and activated.
• Network access to the target.

Exploitation Steps:

1. Enumerate vulnerable endpoints using a tool like curl or Burp Suite.
2. Send a crafted request to a known AJAX action or REST route:

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

3. If the endpoint returns data without authentication, the vulnerability is confirmed.
4. Automate the extraction of sensitive data (e.g., order details, customer PII).

Note: No public exploit code is available. The above is a generic example based on common WordPress plugin vulnerabilities.

Blue Team

Detection & Response:

• Monitor for unusual requests to admin-ajax.php or /wp-json/printcart/v1/ from unauthenticated sources.
• Look for spikes in 403 errors followed by successful data retrieval (if the endpoint is partially protected).
• Use the detection rules provided below.

Honeypot Setup:

• Deploy a decoy WordPress instance with the vulnerable plugin to capture attacker behavior.
• Log all requests to admin-ajax.php and REST API endpoints.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP requests to /wp-admin/admin-ajax.php with action=printcart_* parameters from unauthenticated IPs.
  • Requests to /wp-json/printcart/v1/* without a valid nonce or authentication token.
• File IOCs:
  • Unexpected modifications to the plugin files in /wp-content/plugins/printcart-integration/.
  • Presence of new admin users or altered plugin settings.
• Log IOCs:
  • Repeated 200 OK responses to unauthenticated AJAX calls.
  • Access logs showing admin-ajax.php requests with printcart action strings.

Detection Engineering

YARA Rule

rule CVE_2025_57917_Printcart_Missing_Auth {
    meta:
        description = "Detects exploitation attempts for CVE-2025-57917 in Printcart plugin"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2025-57917"
    strings:
        $ajax_action = "action=printcart_" nocase
        $rest_route = "/printcart/v1/" nocase
        $sensitive_data = "order_id" nocase
    condition:
        any of ($ajax_action, $rest_route) and $sensitive_data
}

Sigma Rule

title: CVE-2025-57917 Printcart Missing Authorization Exploitation
id: 8a4b3c2d-1e5f-6a7b-8c9d-0e1f2a3b4c5d
status: experimental
description: Detects unauthenticated requests to Printcart plugin endpoints
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
    service: access_log
detection:
    selection:
        cs-uri-query|contains:
            - "action=printcart_"
            - "/printcart/v1/"
        sc-status: 200
    condition: selection
falsepositives:
    - Legitimate admin actions (if authenticated)
level: medium

Suricata Rule

alert http any any -> $HOME_NET any (
    msg:"CVE-2025-57917 Printcart Missing Authorization Exploitation";
    flow:to_server,established;
    content:"GET"; http_method;
    content:"admin-ajax.php"; http_uri;
    content:"action=printcart_"; http_uri;
    classtype:attempted-recon;
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin if it is not critical to business operations.
2. Implement a Web Application Firewall (WAF) rule to block requests to admin-ajax.php with action=printcart_* parameters from unauthenticated sources.
3. Restrict access to the WordPress admin area using IP whitelisting or VPN.

Long-Term Fix:

• Monitor the Printcart vendor for an official patch. If none is released, consider replacing the plugin with an alternative solution.
• Apply the principle of least privilege to all WordPress plugins and ensure proper capability checks are in place.

Workaround:

• Add the following code to the theme's functions.php to block unauthenticated access to vulnerable endpoints:

add_action('init', function() {
    if (defined('DOING_AJAX') && DOING_AJAX && !is_user_logged_in()) {
        $action = $_REQUEST['action'] ?? '';
        if (strpos($action, 'printcart_') === 0) {
            wp_die('Unauthorized', 403);
        }
    }
});

Valters IT
Securing Digital Frontiers