CVE-2025-41003: Patient Record Management XSS Vulnerability

CVE-2025-41003 Overview

Imaster's Patient Record Management System contains a stored Cross-Site Scripting (XSS) vulnerability in the endpoint /projects/hospital/admin/edit_patient.php. By injecting a malicious script into the firstname parameter, the JavaScript code is stored and executed every time a user accesses the patient list, allowing an attacker to execute arbitrary JavaScript in a victim's browser.

Critical Impact
Attackers can persistently execute malicious JavaScript in the browsers of healthcare administrators viewing patient records, potentially leading to session hijacking, credential theft, or further attacks against hospital staff.

Affected Products

Imaster Patient Record Management System

Discovery Timeline

2026-01-12 - CVE CVE-2025-41003 published to NVD
2026-01-13 - Last updated in NVD database

Technical Details for CVE-2025-41003

Vulnerability Analysis

This stored Cross-Site Scripting (XSS) vulnerability (CWE-79) exists in Imaster's Patient Record Management System, specifically within the patient editing functionality. The application fails to properly sanitize user-supplied input in the firstname parameter when processing patient record updates through the /projects/hospital/admin/edit_patient.php endpoint.

Unlike reflected XSS attacks that require a victim to click a malicious link, this stored XSS vulnerability persists the malicious payload within the application's database. Once injected, the malicious script executes automatically whenever any user—typically hospital administrators or medical staff—views the patient list. This makes the attack particularly dangerous in healthcare environments where multiple staff members routinely access patient records.

The vulnerability requires low privileges (authenticated access) and passive user interaction, as victims must navigate to the affected patient list page for the payload to trigger. The impact primarily affects the confidentiality and integrity of sessions within the healthcare application.

Root Cause

The root cause of this vulnerability is improper input validation and output encoding in the patient record management functionality. The edit_patient.php endpoint accepts user input for patient demographic fields, including the firstname parameter, without adequate sanitization. When this data is subsequently rendered in the patient list view, the application fails to encode special characters, allowing embedded JavaScript to execute within the context of authenticated user sessions.

Attack Vector

The attack is network-based and can be exploited by any authenticated user with access to edit patient records. An attacker would submit a malicious JavaScript payload as part of the patient's first name field. This payload is then stored in the backend database and rendered without proper encoding whenever the patient list is accessed.

The exploitation flow involves:

An authenticated attacker navigates to the edit patient functionality
The attacker injects malicious JavaScript into the firstname parameter
The payload is stored in the application database
When any administrator or staff member views the patient list, the stored script executes in their browser
The attacker can steal session cookies, redirect users, or perform actions on behalf of the victim

For technical details on the vulnerability mechanism, refer to the INCIBE Security Advisory.

Detection Methods for CVE-2025-41003

Indicators of Compromise

Unusual JavaScript code or HTML tags present in patient name fields within the database
Unexpected outbound network requests from administrator browsers to external domains
Modified patient records containing script tags, event handlers (onerror, onload), or encoded JavaScript
Session token theft or unauthorized administrative actions following patient list access

Detection Strategies

Deploy Web Application Firewall (WAF) rules to detect and block common XSS payloads in form submissions
Implement Content Security Policy (CSP) headers to prevent inline script execution
Monitor database fields for suspicious patterns including <script>, javascript:, and HTML event handlers
Review web server access logs for unusual patterns in requests to /projects/hospital/admin/edit_patient.php

Monitoring Recommendations

Enable logging for all patient record modifications with full request body capture
Set up alerts for any database entries containing HTML or JavaScript syntax in name fields
Monitor for unusual session behavior following patient list page access
Implement browser-based XSS detection using client-side monitoring tools

How to Mitigate CVE-2025-41003

Immediate Actions Required

Apply input validation to reject special characters and HTML/JavaScript syntax in patient name fields
Implement proper output encoding (HTML entity encoding) when rendering patient data in views
Deploy Content Security Policy headers with strict script-src directives
Review existing patient records for any stored malicious payloads and sanitize the database
Restrict access to patient editing functionality to trusted personnel only

Patch Information

Consult the INCIBE Security Advisory for official patch information and vendor guidance. No official patch has been confirmed at the time of this writing. Organizations should contact Imaster directly for remediation updates.

Workarounds

Implement server-side input validation to strip or reject HTML tags and JavaScript syntax from all user inputs
Add output encoding using htmlspecialchars() or equivalent functions when displaying patient data
Deploy a Web Application Firewall with XSS protection rules enabled
Consider disabling the patient editing feature until a patch is available in high-risk environments

bash

# Example Content Security Policy header configuration for Apache
# Add to .htaccess or httpd.conf
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; object-src 'none'"