CVE-2025-68059

Executive Summary

CVE-2025-68059 is a critical Missing Authorization vulnerability in the e-plugins Hotel Listing WordPress plugin, affecting all versions up to and including 1.4.2. This flaw allows unauthenticated attackers to exploit incorrectly configured access control security levels, potentially leading to unauthorized data access, modification, or deletion of hotel listings and associated metadata. The vulnerability is classified under CWE-862 (Missing Authorization) and is mapped to MITRE ATT&CK tactic T1190 (Exploit Public-Facing Application). As a WordPress plugin vulnerability, it directly impacts the WordPress ecosystem and does not involve Apache or Nginx misconfigurations. No public proof-of-concept (PoC) or exploit code is currently available, and the vendor has not released a patch, leaving all installations at risk.

Supply Chain & Package Security

This vulnerability resides in a WordPress plugin distributed via the official WordPress plugin repository. Users who installed the plugin through the WordPress dashboard or via direct download are affected. The lack of a patch from the vendor creates a supply chain risk, as site administrators must rely on manual mitigation or plugin removal. No known compromised versions have been reported in package mirrors.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
• Base Score: 7.6 (High)
• 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: High (C:H)
• Integrity Impact: High (I:H)
• Availability Impact: None (A:N)

Threat Level: High. The vulnerability is remotely exploitable without authentication, allowing attackers to read and modify sensitive data. The absence of a patch increases the risk of zero-day exploitation.

Deep Dive & Mechanics

The vulnerability stems from missing authorization checks in the hotel-listing plugin's REST API endpoints or AJAX handlers. The plugin likely exposes functions for creating, reading, updating, or deleting hotel listings without verifying user capabilities (e.g., edit_posts, manage_options). Attackers can send crafted HTTP requests to these endpoints to perform unauthorized actions.

Root Cause: The plugin fails to implement WordPress capability checks (e.g., current_user_can()) before executing privileged operations. This allows any unauthenticated user to invoke administrative functions.

Attack Vector: An attacker sends a POST or GET request to a vulnerable endpoint (e.g., /wp-json/hotel-listing/v1/delete-listing) with parameters to manipulate listings. The server processes the request without verifying the user's role.

Impact: Attackers can:

• View all hotel listings (including private/draft posts).
• Modify or delete listings.
• Potentially escalate privileges if the plugin interacts with user roles or options.

Vulnerable vs. Patched Code

Since no patch is available, the following illustrates the vulnerable pattern and a hypothetical fix.

Vulnerable Code (PHP):

add_action('wp_ajax_nopriv_hotel_delete', 'hotel_delete_listing');
function hotel_delete_listing() {
    $listing_id = $_POST['listing_id'];
    wp_delete_post($listing_id, true);
    wp_die();
}

Patched Code (Hypothetical):

add_action('wp_ajax_hotel_delete', 'hotel_delete_listing');
function hotel_delete_listing() {
    if (!current_user_can('edit_posts')) {
        wp_die('Unauthorized', 403);
    }
    $listing_id = intval($_POST['listing_id']);
    wp_delete_post($listing_id, true);
    wp_die();
}

Key Differences:

• The vulnerable code uses wp_ajax_nopriv_* (allows unauthenticated access) and lacks capability checks.
• The patched code uses wp_ajax_* (requires authentication) and adds current_user_can().

Exploitation & Lab Setup

Red Team (Exploitation)

Prerequisites:

• Target WordPress site with Hotel Listing plugin <= 1.4.2.
• Network access to the site.

Exploitation Steps:

1. Identify vulnerable endpoints by analyzing plugin source code or using fuzzing.
2. Send a crafted HTTP request to delete a listing:

   curl -X POST https://target.com/wp-admin/admin-ajax.php \
     -d "action=hotel_delete&listing_id=123"
   

3. Verify deletion by checking the site's frontend or admin panel.

Note: No public exploit code is available; this is a conceptual demonstration.

Blue Team (Detection & Defense)

Detection:

• Monitor for unusual AJAX requests to admin-ajax.php with action parameters related to hotel listings.
• Alert on requests from unauthenticated users to endpoints that should require authentication.

Defense:

• Disable the plugin immediately if not essential.
• Implement a Web Application Firewall (WAF) rule to block requests to known vulnerable endpoints.
• Apply virtual patching via a security plugin (e.g., Wordfence) to add capability checks.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP requests to /wp-admin/admin-ajax.php with action=hotel_* parameters from unauthenticated sources.
  • Unusual POST requests to /wp-json/hotel-listing/v1/* endpoints.
• File IOCs:
  • Presence of the plugin directory /wp-content/plugins/hotel-listing/ with version <= 1.4.2.
• Log IOCs:
  • WordPress debug logs showing wp_die calls or unauthorized access attempts to plugin endpoints.

Detection Engineering

YARA Rule

rule CVE_2025_68059_Hotel_Listing_Missing_Auth {
    meta:
        description = "Detects vulnerable Hotel Listing plugin files with missing authorization"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-68059"
    strings:
        $vuln_func = "wp_ajax_nopriv_" nocase
        $vuln_action = "hotel_" nocase
        $missing_cap = "current_user_can" nocase
    condition:
        $vuln_func and $vuln_action and not $missing_cap
}

Sigma Rule

title: CVE-2025-68059 - Missing Authorization in Hotel Listing Plugin
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects unauthenticated AJAX requests to hotel listing endpoints
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
    service: access_combined
detection:
    selection:
        cs-method: 'POST'
        cs-uri-query|contains: 'admin-ajax.php'
        cs-uri-query|contains|all:
            - 'action=hotel_'
            - 'listing_id='
    condition: selection
falsepositives:
    - Legitimate admin actions (rare)
level: high

Suricata Rule

alert http any any -> $HOME_NET any (
    msg:"CVE-2025-68059 - Hotel Listing Missing Authorization Exploit";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"admin-ajax.php"; http_uri;
    content:"action=hotel_"; http_client_body;
    content:"listing_id="; http_client_body;
    classtype:attempted-admin;
    sid:10000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin via WordPress admin or by renaming the plugin directory:

   mv /var/www/html/wp-content/plugins/hotel-listing /var/www/html/wp-content/plugins/hotel-listing-disabled
   

2. Implement a WAF rule to block requests to admin-ajax.php with action=hotel_* parameters from unauthenticated users.
3. Monitor logs for exploitation attempts.

Long-Term Actions:

• Contact the vendor for a patch or consider switching to an alternative plugin.
• Apply virtual patching using a security plugin (e.g., Wordfence, Sucuri).
• Regularly audit WordPress plugins for vulnerabilities.

Workaround: If the plugin is critical, restrict access to admin-ajax.php via .htaccess:

<Files "admin-ajax.php">
    Require ip 127.0.0.1
</Files>

Note: This may break legitimate AJAX functionality.

Valters IT
Securing Digital Frontiers