CVE-2025-26750

Executive Summary

CVE-2025-26750 is a Missing Authorization vulnerability in the Vitepos WordPress plugin (vitepos-lite) developed by Appsbd. This flaw allows an unauthenticated attacker to exploit incorrectly configured access control security levels, potentially leading to unauthorized data access or modification. The vulnerability affects all versions up to and including 3.1.3. With a CVSS score of 6.5 (Medium), the risk is elevated due to the lack of required privileges and the potential for exploitation over the network. As of this report, no official patch has been released, and no public proof-of-concept (PoC) or exploit code is available. The EPSS score is 0.0%, indicating low exploitation likelihood at this time, but the absence of a patch makes proactive detection and mitigation critical.

Supply Chain & Package Security

This vulnerability resides in the WordPress plugin ecosystem, specifically the Vitepos plugin. WordPress plugins are distributed via the official WordPress Plugin Directory and third-party marketplaces. Users should verify the integrity of their plugin installations and monitor for updates from the vendor. Since no patch is available, consider removing or disabling the plugin until a fix is released.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
• Base Score: 6.5 (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: Low (I:L)
• Availability Impact: None (A:N)

Threat Level: Medium. The vulnerability is exploitable without authentication, but the impact is limited to low confidentiality and integrity loss. However, in a WordPress context, this could lead to unauthorized access to order data, customer information, or plugin settings.

Deep Dive & Mechanics

The vulnerability stems from a Missing Authorization check (CWE-862) in the Vitepos plugin's REST API endpoints or AJAX handlers. The plugin likely exposes functions that perform sensitive operations (e.g., retrieving sales data, modifying settings, or accessing customer records) without verifying that the requesting user has the appropriate capabilities (e.g., manage_options or edit_posts). An unauthenticated attacker can send crafted HTTP requests to these endpoints and bypass access controls.

Root Cause: The plugin fails to implement WordPress capability checks (e.g., current_user_can()) or nonce verification on certain actions, allowing any visitor to trigger privileged operations.

Attack Scenario:

1. An attacker identifies a vulnerable Vitepos endpoint (e.g., /wp-json/vitepos/v1/orders or an AJAX action).
2. The attacker sends a GET or POST request without authentication.
3. The plugin processes the request and returns sensitive data or performs unauthorized actions.

Vulnerable vs. Patched Code

Since no patch is available, a hypothetical fix would involve adding authorization checks. Below is an example of vulnerable and patched code patterns.

Vulnerable Code (vitepos-lite <= 3.1.3):

add_action('wp_ajax_nopriv_vitepos_get_orders', 'vitepos_get_orders');
function vitepos_get_orders() {
    // No capability check
    $orders = get_posts(array('post_type' => 'shop_order', 'numberposts' => -1));
    wp_send_json($orders);
}

Patched Code (Hypothetical):

add_action('wp_ajax_nopriv_vitepos_get_orders', 'vitepos_get_orders');
function vitepos_get_orders() {
    // Add capability check
    if (!current_user_can('manage_woocommerce')) {
        wp_die('Unauthorized', 403);
    }
    $orders = get_posts(array('post_type' => 'shop_order', 'numberposts' => -1));
    wp_send_json($orders);
}

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• A WordPress site with Vitepos plugin version <= 3.1.3 installed and activated.
• Network access to the target.

Steps:

1. Identify Endpoints: Use a tool like Burp Suite or curl to enumerate REST API endpoints. Common patterns include /wp-json/vitepos/v1/ or AJAX actions like vitepos_get_data.
2. Craft Request: Send an unauthenticated request to a vulnerable endpoint.

   curl -X GET "http://target.com/wp-json/vitepos/v1/orders" -H "User-Agent: Mozilla/5.0"
   

3. Analyze Response: If the response contains sensitive data (e.g., order details, customer info), the vulnerability is confirmed.

Note: No public exploit code is available. This is a generic exploitation approach.

Blue Team (Detection & Defense)

Detection:

• Monitor for unusual requests to /wp-json/vitepos/ or AJAX actions without authentication.
• Look for spikes in 403 errors (if patched) or successful responses to unauthenticated requests.

Defense:

• Immediate: Disable or remove the Vitepos plugin until a patch is released.
• Web Application Firewall (WAF): Create rules to block requests to known vulnerable endpoints from unauthenticated users.
• Access Control: Implement a reverse proxy or authentication gateway for WordPress admin areas.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP requests to /wp-json/vitepos/v1/* without a valid X-WP-Nonce header.
  • AJAX requests to admin-ajax.php with action parameters like vitepos_get_orders or vitepos_update_settings from unauthenticated sources.
• File IOCs:
  • Presence of the vitepos-lite plugin directory in /wp-content/plugins/.
  • Modified plugin files (e.g., vitepos.php) with unauthorized changes.
• Log IOCs:
  • WordPress debug log entries showing current_user_can() failures or missing capability errors.
  • Web server access logs with repeated requests to /wp-json/vitepos/ from the same IP.

Detection Engineering

YARA Rule

rule CVE_2025_26750_Vitepos_Missing_Auth {
    meta:
        description = "Detects Vitepos plugin files with missing authorization checks"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-26750"
    strings:
        $vuln_func = "wp_ajax_nopriv_vitepos" nocase
        $no_check = "current_user_can" nocase
    condition:
        $vuln_func and not $no_check
}

Sigma Rule

title: CVE-2025-26750 - Vitepos Missing Authorization Exploitation Attempt
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects unauthenticated requests to Vitepos plugin endpoints
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'GET'
        cs-uri-query|contains: '/wp-json/vitepos/'
        sc-status: 200
    condition: selection
falsepositives:
    - Legitimate authenticated users (if any)
level: high

Suricata Rule

alert http any any -> $HOME_NET any (
    msg:"CVE-2025-26750 - Vitepos Missing Authorization Exploit Attempt";
    flow:to_server,established;
    content:"/wp-json/vitepos/"; http_uri;
    nocase;
    sid:1000001;
    rev:1;
    metadata:created_at 2025-04-10, updated_at 2025-04-10;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the Plugin: Deactivate and delete the Vitepos plugin from all WordPress installations until a patch is released.
2. Monitor Logs: Review web server and WordPress logs for signs of exploitation.
3. WAF Rules: Implement virtual patching via WAF to block unauthenticated requests to /wp-json/vitepos/ endpoints.

Long-Term Actions:

1. Vendor Contact: Reach out to Appsbd for a patch timeline. If unresponsive, consider forking the plugin or switching to an alternative.
2. Code Audit: If the plugin is critical, perform a security audit to identify and fix missing authorization checks.
3. Update Policy: Enforce a policy of using only actively maintained plugins with a history of timely security updates.

Workaround: If the plugin cannot be removed, restrict access to its endpoints via .htaccess:

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteCond %{REQUEST_URI} ^/wp-json/vitepos/ [NC]
    RewriteCond %{HTTP_COOKIE} !wordpress_logged_in [NC]
    RewriteRule .* - [F,L]
</IfModule>

Valters IT
DevSecOps & Cyber Threat Intelligence