CVE-2025-39393

Executive Summary

CVE-2025-39393 is a reflected Cross-Site Scripting (XSS) vulnerability in the Mojoomla Hospital Management System, affecting versions up to and including 47.0 (released 20-11-2023). The vulnerability stems from improper neutralization of user-supplied input during web page generation, allowing an attacker to inject arbitrary JavaScript into a reflected response. This flaw is classified under CWE-79 and carries a CVSS score of 7.1 (High). As of this report, no official patch has been released, and no public proof-of-concept (PoC) or exploit code is available. The vulnerability is specific to the WordPress ecosystem, as Mojoomla develops plugins and themes for WordPress-based hospital management solutions.

Supply Chain & Package Security

This vulnerability is not associated with NPM, PyPI, Go, or Ruby packages. It is a WordPress plugin/theme component, and the risk is limited to sites running the vulnerable Mojoomla Hospital Management System. No supply chain compromise has been identified.

CVSS Breakdown & Threat Level

• CVSS Score: 7.1 (High)
• Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
• Attack Vector (AV): Network – The vulnerability is exploitable remotely.
• Attack Complexity (AC): Low – No special conditions are required.
• Privileges Required (PR): None – No authentication needed.
• User Interaction (UI): Required – The victim must click a crafted link or visit a malicious page.
• Scope (S): Changed – The injected script can affect resources beyond the vulnerable component.
• Confidentiality (C): Low – Limited data exposure possible.
• Integrity (I): Low – Limited ability to modify content.
• Availability (A): Low – Limited impact on service availability.

Threat Level: High. Although no public exploit exists, the vulnerability is trivial to exploit once discovered, and the lack of a patch increases risk for all unpatched installations.

Deep Dive & Mechanics

The vulnerability is a reflected XSS in the Mojoomla Hospital Management System. The application fails to sanitize or encode user-supplied input before reflecting it in the HTTP response. An attacker can craft a malicious URL containing JavaScript payloads in query parameters or form fields. When a victim clicks the link, the script executes in the context of the victim's browser, potentially leading to session hijacking, credential theft, or defacement.

Root Cause: The application uses $_GET or $_REQUEST parameters directly in output without proper escaping or validation. For example, a search parameter might be echoed back in the page without htmlspecialchars() or equivalent sanitization.

Attack Flow:

1. Attacker crafts a URL: https://victim-hospital.com/?search=<script>alert('XSS')</script>
2. Victim clicks the link (e.g., via phishing email).
3. The server reflects the input in the response without sanitization.
4. The browser executes the injected script.

Vulnerable vs. Patched Code

Since no patch is available, the following is a hypothetical comparison based on common XSS fixes.

Vulnerable Code (PHP example):

<?php
$search = $_GET['search'];
echo "You searched for: " . $search;
?>

Patched Code (Hypothetical):

<?php
$search = htmlspecialchars($_GET['search'], ENT_QUOTES, 'UTF-8');
echo "You searched for: " . $search;
?>

The patched version uses htmlspecialchars() to encode special HTML characters, preventing script injection.

Exploitation & Lab Setup

Red Team (Attack Simulation)

Since no public exploit exists, a manual test can be performed:

1. Setup: Install a vulnerable version of Mojoomla Hospital Management System (<= 47.0) on a local WordPress instance.
2. Craft Payload: Use a simple XSS payload: <script>alert(document.cookie)</script>
3. Inject: Append the payload to a reflected parameter (e.g., ?search=<script>alert(document.cookie)</script>).
4. Deliver: Send the crafted URL to a victim (simulated via browser).
5. Observe: The script executes, displaying the victim's cookies.

Example URL:

http://localhost/wp-content/plugins/hospital-management/search.php?q=<script>alert('XSS')</script>

Blue Team (Defense & Detection)

• Web Application Firewall (WAF): Deploy rules to block reflected XSS patterns (e.g., <script>, onerror=, javascript:).
• Input Validation: Implement server-side validation and output encoding.
• Content Security Policy (CSP): Enforce a strict CSP to block inline scripts.
• User Education: Train users to avoid clicking suspicious links.

Indicators of Compromise (IOCs)

• Network IOCs:
  • URLs containing <script> tags or JavaScript event handlers in query parameters.
  • HTTP requests with unusual parameters like ?search=<script>, ?q=alert(1), etc.
• Host IOCs:
  • Unexpected JavaScript execution in browser console.
  • Unauthorized cookie theft or session hijacking.
• Log IOCs:
  • Web server logs showing requests with XSS payloads (e.g., GET /?search=<script>alert(1)</script>).

Detection Engineering

YARA Rule

rule CVE_2025_39393_XSS_Reflected {
    meta:
        description = "Detects reflected XSS attempts targeting Mojoomla Hospital Management System"
        author = "Valters IT"
        date = "2025-04-17"
        cve = "CVE-2025-39393"
    strings:
        $xss1 = /<script[^>]*>.*?<\/script>/i
        $xss2 = /onerror\s*=\s*["']?[^"'\s>]+/i
        $xss3 = /javascript\s*:/i
        $param = /[?&](search|q|s|query)=/i
    condition:
        any of ($xss*) and $param
}

Sigma Rule

title: Reflected XSS Attempt Against Mojoomla Hospital Management System
id: 8a3b2c1d-4e5f-6a7b-8c9d-0e1f2a3b4c5d
status: experimental
description: Detects HTTP requests containing XSS payloads targeting vulnerable parameters
author: Valters IT
date: 2025-04-17
logsource:
    category: webserver
    product: apache
    service: access_log
detection:
    selection:
        cs-method: 'GET'
        cs-uri-query|contains:
            - '<script>'
            - 'onerror='
            - 'javascript:'
        cs-uri-query|re: '(?i)(search|q|s|query)='
    condition: selection
falsepositives:
    - Legitimate use of script tags in search (unlikely)
level: high

Suricata Rule

alert http any any -> any any (msg:"CVE-2025-39393 Reflected XSS Attempt"; flow:to_server,established; content:"GET"; http_method; content:"?search="; http_uri; pcre:"/<script[^>]*>.*?<\/script>/i"; sid:1000001; rev:1;)

Remediation & Mitigation

• Immediate Action: Disable or remove the vulnerable component if possible. Since no patch is available, consider replacing the plugin with an alternative.
• Workaround: Implement a WAF rule to block reflected XSS patterns. Use CSP headers to restrict script execution.
• Long-term Fix: The vendor must release a patched version that properly sanitizes all user inputs. Monitor the Mojoomla website for updates.
• User Guidance: Avoid clicking untrusted links, especially those containing query parameters.

Valters IT
Securing Digital Frontiers