CVE-2025-54853
📋 TL;DR
A reflected cross-site scripting vulnerability in MedDream PACS Premium allows attackers to execute arbitrary JavaScript code by tricking users into clicking malicious URLs. This affects healthcare organizations using MedDream PACS Premium 7.3.6.870 for medical imaging. Attackers can steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- MedDream PACS Premium
📦 What is this software?
Pacs Server by Meddream
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals administrator session cookies, gains full system access, exfiltrates patient medical data, and potentially modifies medical images or records.
Likely Case
Attacker steals user session cookies to access patient data, perform unauthorized actions, or redirect to phishing sites.
If Mitigated
With proper input validation and output encoding, the vulnerability is prevented; with web application firewalls, malicious requests are blocked.
🎯 Exploit Status
Exploitation requires user interaction (clicking a malicious link), but crafting the URL is straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Contact MedDream vendor for patch or update. 2. Apply any available security updates. 3. Test in a non-production environment first.
🔧 Temporary Workarounds
Implement Input Validation and Output Encoding
allSanitize user inputs in the modifyUser functionality to prevent XSS payloads.
Not applicable - requires code changes
Deploy Web Application Firewall (WAF)
allConfigure WAF rules to block XSS patterns in URLs and parameters.
Not applicable - configuration dependent
🧯 If You Can't Patch
- Restrict access to the MedDream PACS interface to trusted networks only.
- Implement Content Security Policy (CSP) headers to mitigate script execution.
🔍 How to Verify
Check if Vulnerable:
Test the modifyUser functionality with XSS payloads in URL parameters; if scripts execute, the system is vulnerable.Check Version:
Check the MedDream PACS interface or configuration files for version information; typically in admin panel or about section.Verify Fix Applied:
Retest with XSS payloads after applying fixes; ensure scripts do not execute and inputs are properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters with script tags or JavaScript code in access logs.
- Multiple failed attempts to access modifyUser with suspicious inputs.
Network Indicators:
- HTTP requests to modifyUser endpoint containing <script> or javascript: in parameters.
- Traffic patterns indicating phishing attempts targeting the system.
SIEM Query:
source="web_logs" AND uri="*modifyUser*" AND (param="*<script>*" OR param="*javascript:*")