CVE-2025-53516
📋 TL;DR
A reflected cross-site scripting vulnerability in MedDream PACS Premium allows attackers to execute arbitrary JavaScript code by tricking users into clicking a malicious URL. This affects healthcare organizations using the vulnerable version of this medical imaging software. Attackers could 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
Attackers steal healthcare provider credentials, access patient medical records, modify medical images, or pivot to other hospital systems.
Likely Case
Session hijacking leading to unauthorized access to patient data and potential data exfiltration.
If Mitigated
Limited to stealing session cookies from users who click malicious links, with proper network segmentation preventing lateral movement.
🎯 Exploit Status
The vulnerability requires user interaction (clicking a link) but is trivial to exploit once the malicious URL is crafted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with MedDream vendor for specific patched version
Vendor Advisory: https://talosintelligence.com/vulnerability_reports/TALOS-2025-2254
Restart Required: Yes
Instructions:
1. Contact MedDream support for the latest patched version
2. Backup current configuration and data
3. Apply the vendor-provided patch
4. Restart the MedDream PACS service
5. Verify the fix by testing the downloadZip functionality
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with XSS protection rules to block malicious requests
Configure WAF to block requests containing <script> tags and JavaScript patterns in URL parameters
Content Security Policy (CSP)
allImplement strict CSP headers to prevent inline script execution
Add header: Content-Security-Policy: script-src 'self'
🧯 If You Can't Patch
- Isolate the MedDream server in a separate network segment with strict access controls
- Implement mandatory user training about phishing risks and suspicious URLs
🔍 How to Verify
Check if Vulnerable:
Test the downloadZip endpoint with XSS payloads in URL parameters and check if they executeCheck Version:
Check MedDream admin interface or configuration files for version informationVerify Fix Applied:
After patching, test with the same XSS payloads to ensure they are properly sanitized or blocked📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters containing script tags or JavaScript code in downloadZip requests
- Multiple failed XSS attempts from single IP
Network Indicators:
- HTTP requests with suspicious parameters like <script>, javascript:, or encoded payloads
SIEM Query:
source="meddream_logs" AND (url="*downloadZip*" AND (param="*<script>*" OR param="*javascript:*"))