CVE-2025-69341

Executive Summary

CVE-2025-69341 is a Missing Authorization vulnerability in the WeDesignTech Ultimate Booking Addon WordPress plugin (versions <= 1.0.3). This flaw allows unauthenticated attackers to exploit incorrectly configured access control security levels, potentially leading to unauthorized data access or modification of booking-related resources. The vulnerability resides in the WordPress plugin ecosystem, specifically within the wedesigntech-ultimate-booking-addon component. No public proof-of-concept (PoC) or patch is currently available, and the EPSS score is 0.0%, indicating low exploitation likelihood at this time. However, the lack of a patch makes this a latent risk for sites using the plugin.

Supply Chain & Package Security

This vulnerability affects a WordPress plugin distributed via the WordPress plugin repository or third-party sources. Since it is a PHP-based plugin, the supply chain risk includes:

• Compromised plugin updates if the vendor’s distribution channel is breached.
• Dependency risks from third-party libraries used by the plugin.
• No known patch means site administrators must manually disable or remove the plugin to mitigate risk.

CVSS Breakdown & Threat Level

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

Threat Level: Medium (5.4) – Exploitation is straightforward but impact is limited to low confidentiality and integrity loss.

Deep Dive & Mechanics

The vulnerability stems from missing authorization checks in the plugin’s REST API endpoints or AJAX handlers. WordPress plugins often register custom routes or actions without verifying user capabilities (e.g., current_user_can()). In this case, the plugin fails to enforce access controls for booking-related operations, allowing unauthenticated attackers to:

• View or modify booking data.
• Access sensitive configuration options.
• Potentially escalate privileges if combined with other flaws.

The affected version range is <= 1.0.3. The exact vulnerable function is not publicly documented, but typical patterns include:

// Vulnerable pattern: No capability check
add_action('wp_ajax_nopriv_booking_action', 'handle_booking');
function handle_booking() {
    // Process request without checking user permissions
}

Vulnerable vs. Patched Code

Since no patch is available, the following illustrates a hypothetical fix:

Vulnerable Code (<= 1.0.3):

add_action('wp_ajax_nopriv_wtb_update_booking', 'wtb_update_booking');
function wtb_update_booking() {
    $booking_id = $_POST['booking_id'];
    // Update booking without authorization
    update_post_meta($booking_id, 'status', 'confirmed');
    wp_die();
}

Patched Code (Hypothetical):

add_action('wp_ajax_wtb_update_booking', 'wtb_update_booking');
add_action('wp_ajax_nopriv_wtb_update_booking', 'wtb_update_booking_noauth');
function wtb_update_booking() {
    if (!current_user_can('edit_posts')) {
        wp_die('Unauthorized', 403);
    }
    $booking_id = intval($_POST['booking_id']);
    update_post_meta($booking_id, 'status', 'confirmed');
    wp_die();
}
function wtb_update_booking_noauth() {
    wp_die('Unauthorized', 403);
}

Exploitation & Lab Setup

Red Team (Offensive)

Lab Setup:

1. Install WordPress 6.x with WeDesignTech Ultimate Booking Addon <= 1.0.3.
2. Identify vulnerable endpoints using a proxy (e.g., Burp Suite) or by reviewing plugin source code.
3. Craft an unauthenticated request to trigger the missing authorization.

Exploit Example (cURL):

curl -X POST 'http://target/wp-admin/admin-ajax.php' \
  -d 'action=wtb_update_booking&booking_id=1&status=cancelled'

Expected Outcome: The booking status is modified without authentication.

Blue Team (Defensive)

Detection:

• Monitor for POST requests to /wp-admin/admin-ajax.php with action parameters matching plugin-specific actions (e.g., wtb_*).
• Alert on requests from unauthenticated users (no Cookie header with valid WordPress session).

Mitigation:

• Disable or remove the plugin immediately.
• Implement a Web Application Firewall (WAF) rule to block unauthenticated access to plugin AJAX endpoints.

Indicators of Compromise (IOCs)

• Network IOCs:
  • POST /wp-admin/admin-ajax.php with action=wtb_* parameters.
  • Source IPs performing repeated unauthenticated AJAX requests.
• File IOCs:
  • Presence of plugin directory /wp-content/plugins/wedesigntech-ultimate-booking-addon/.
  • Modified post meta entries for booking posts (e.g., _wtb_booking_status).
• Log IOCs:
  • WordPress debug log entries showing wp_ajax_nopriv_* calls without authentication.

Detection Engineering

YARA Rule

rule CVE_2025_69341_WeDesignTech_Booking {
    meta:
        description = "Detects vulnerable WeDesignTech Ultimate Booking Addon plugin files"
        author = "Valters IT"
        date = "2025-04-10"
        cve = "CVE-2025-69341"
    strings:
        $vuln_func = "wp_ajax_nopriv_" nocase
        $plugin_slug = "wedesigntech-ultimate-booking-addon" nocase
    condition:
        $plugin_slug and #vuln_func > 0
}

Sigma Rule

title: Unauthenticated AJAX Request to WeDesignTech Booking Plugin
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects unauthenticated POST requests to WordPress AJAX endpoints used by the vulnerable plugin
logsource:
    category: webserver
    product: apache
    service: access
detection:
    selection:
        cs-method: 'POST'
        c-uri|contains: '/wp-admin/admin-ajax.php'
        cs-uri-query|contains: 'action=wtb_'
        cs-cookie: ''  # No cookie indicates unauthenticated
    condition: selection
falsepositives:
    - Legitimate unauthenticated actions (if any)
level: high

Suricata Rule

alert http any any -> $HOME_NET any (
    msg:"CVE-2025-69341 - Unauthenticated WeDesignTech Booking AJAX Request";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"/wp-admin/admin-ajax.php"; http_uri;
    content:"action=wtb_"; http_client_body;
    pcre:"/Cookie:\s*[^;]*/";  # No valid cookie
    sid:10000001;
    rev:1;
)

Remediation & Mitigation

1. Immediate Action: Disable and remove the wedesigntech-ultimate-booking-addon plugin from all WordPress installations.
2. Vendor Contact: Reach out to BuddhaThemes for an official patch. If unavailable, consider migrating to an alternative booking plugin.
3. WAF Rules: Block all unauthenticated requests to /wp-admin/admin-ajax.php that contain action=wtb_ parameters.
4. Monitoring: Enable detailed logging for AJAX requests and review for suspicious activity.
5. Long-term: Implement a WordPress security plugin (e.g., Wordfence) to enforce capability checks on all AJAX endpoints.

Valters IT
DevSecOps & Cyber Threat Intelligence
Report generated for CVE-2025-69341