CVE-2025-69092

Executive Summary

CVE-2025-69092 is a DOM-Based Cross-Site Scripting (XSS) vulnerability identified in the WordPress plugin Essential Addons for Elementor (slug: essential-addons-for-elementor-lite) developed by WPDeveloper. The vulnerability affects all versions up to and including 6.5.3. It stems from improper neutralization of user-supplied input during web page generation, allowing an attacker to inject malicious scripts that execute in the context of the victim's browser. The CVSS score is 6.5 (Medium), and the EPSS probability is 0.0%, indicating low exploitation likelihood at this time. No public proof-of-concept (PoC) or exploit code has been released, and no patch is currently available.

Supply Chain & Package Security

This vulnerability resides in a WordPress plugin distributed via the official WordPress Plugin Directory. The plugin is a commercial product with a free tier (essential-addons-for-elementor-lite). The supply chain risk is moderate: if the plugin is compromised at the source, updates could deliver malicious code to thousands of sites. Administrators should verify plugin integrity via checksums and monitor the WPDeveloper vendor for patch announcements.

CVSS Breakdown & Threat Level

• Attack Vector (AV): Network (N) – The vulnerability can be exploited remotely.
• Attack Complexity (AC): Low (L) – No special conditions required.
• Privileges Required (PR): None (N) – No authentication needed.
• User Interaction (UI): Required (R) – The victim must click a crafted link or visit a malicious page.
• Scope (S): Changed (C) – The impact extends beyond the vulnerable component.
• Confidentiality (C): Low (L) – Limited data exposure.
• Integrity (I): Low (L) – Limited ability to modify content.
• Availability (A): Low (L) – Limited service disruption.

Threat Level: Medium. DOM-based XSS can lead to session hijacking, credential theft, and defacement. However, the lack of public exploits and low EPSS score reduce immediate risk.

Deep Dive & Mechanics

The vulnerability is a DOM-Based XSS, meaning the injection occurs entirely on the client side via JavaScript. The plugin's JavaScript code processes user input (e.g., URL fragments, form fields, or widget attributes) and writes it directly into the DOM without proper sanitization. An attacker can craft a malicious URL or input that, when processed by the plugin's scripts, executes arbitrary JavaScript in the victim's browser.

Root Cause: The plugin fails to sanitize or encode user-controlled data before using it in DOM manipulation methods like innerHTML, document.write, or eval. This allows an attacker to break out of the intended context and inject script tags or event handlers.

Attack Vector: The attacker sends a crafted link to a victim (e.g., via email or social engineering). The link contains a malicious payload in a query parameter or fragment identifier. When the victim visits the page, the plugin's JavaScript reads the payload and injects it into the DOM, executing the attacker's code.

Vulnerable vs. Patched Code

Since no patch is available, we analyze the vulnerable pattern. The vulnerable code likely resembles:

// Vulnerable code (example)
var userInput = window.location.hash.substring(1);
document.getElementById('output').innerHTML = userInput;

A patched version would sanitize the input:

// Patched code (example)
var userInput = window.location.hash.substring(1);
var safeOutput = document.createTextNode(userInput);
document.getElementById('output').appendChild(safeOutput);

The patch must use safe DOM methods (e.g., textContent, createTextNode) or encode HTML entities before insertion.

Exploitation & Lab Setup

Red Team

Prerequisites:

• A WordPress site with Essential Addons for Elementor <= 6.5.3 installed and active.
• A victim user with a modern browser.

Exploitation Steps:

1. Identify a vulnerable endpoint where the plugin processes user input (e.g., a widget that reads URL parameters).
2. Craft a malicious URL:

   https://victim-site.com/?page_id=123#<img src=x onerror=alert('XSS')>
   

3. Send the link to the victim via phishing or social engineering.
4. When the victim clicks the link, the plugin's JavaScript executes the payload, triggering the alert().

Note: No public exploit code is available. The above is a generic example.

Blue Team

Detection & Prevention:

• Monitor web server logs for requests containing suspicious patterns like <script, onerror=, or javascript: in URL fragments or query parameters.
• Deploy a Web Application Firewall (WAF) with rules to block DOM-based XSS payloads.
• Use Content Security Policy (CSP) headers to restrict script execution.
• Educate users about phishing links.

Indicators of Compromise (IOCs)

• Network IOCs:
  • URLs containing #<script or #<img in the fragment identifier.
  • HTTP requests with unusual query parameters containing HTML/JavaScript.
• Host IOCs:
  • Unexpected JavaScript execution in the browser (visible via developer console).
  • Modified DOM elements containing injected scripts.
• File IOCs:
  • Plugin files in /wp-content/plugins/essential-addons-for-elementor-lite/ with suspicious modifications.

Detection Engineering

YARA Rule

rule CVE_2025_69092_DOM_XSS {
    meta:
        description = "Detects potential DOM-based XSS payloads in Essential Addons for Elementor"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-69092"
    strings:
        $payload1 = /#<[^>]*on\w+\s*=/ nocase
        $payload2 = /#<script[^>]*>/ nocase
        $payload3 = /#javascript:/ nocase
    condition:
        any of them
}

Sigma Rule

title: CVE-2025-69092 DOM-Based XSS in Essential Addons for Elementor
id: 8a4b3c2d-1e5f-6a7b-8c9d-0e1f2a3b4c5d
status: experimental
description: Detects HTTP requests with DOM-based XSS payloads targeting the plugin
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        c-uri|contains:
            - '#<script'
            - '#<img'
            - '#onerror='
            - '#javascript:'
    condition: selection
falsepositives:
    - Legitimate use of hash fragments with similar patterns (rare)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-69092 DOM-Based XSS Attempt"; flow:to_server; content:"#<script"; nocase; sid:1000001; rev:1;)
alert http any any -> any any (msg:"CVE-2025-69092 DOM-Based XSS Attempt"; flow:to_server; content:"#<img"; nocase; sid:1000002; rev:1;)
alert http any any -> any any (msg:"CVE-2025-69092 DOM-Based XSS Attempt"; flow:to_server; pcre:"/#<[^>]*on\w+\s*=/i"; sid:1000003; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Disable the plugin until a patch is released.
2. Implement a WAF with custom rules to block DOM-based XSS payloads.
3. Add CSP headers to restrict inline script execution:

   Content-Security-Policy: default-src 'self'; script-src 'self' 'unsafe-eval' 'nonce-<random>';
   

4. Monitor for any suspicious activity in web logs.

Long-Term Fix:

• Apply the official patch from WPDeveloper as soon as it is released.
• Update the plugin to the latest version once patched.
• Conduct a security audit of all third-party plugins.

Valters IT Signature Report generated by Valters IT DevSecOps Framework – CVE-2025-69092 Analysis