CVE-2025-54861
📋 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, performs phishing attacks, or redirects users to malicious sites.
If Mitigated
Attack limited to stealing non-sensitive session data if proper input validation and output encoding are implemented.
🎯 Exploit Status
Reflected XSS typically requires social engineering to deliver malicious URL. No authentication required to trigger vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Contact MedDream vendor for patch availability
2. Apply vendor-provided patch when available
3. Test in non-production environment first
4. Deploy to production systems
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy WAF with XSS protection rules to block malicious requests
Input Validation
allImplement server-side input validation for modifyCoercion parameters
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Deploy network segmentation to isolate MedDream PACS from internet access
🔍 How to Verify
Check if Vulnerable:
Test modifyCoercion endpoint with XSS payloads like <script>alert('test')</script> in URL parametersCheck Version:
Check MedDream PACS version in administration interface or configuration filesVerify Fix Applied:
Verify input validation sanitizes script tags and output encoding is properly applied📡 Detection & Monitoring
Log Indicators:
- Unusual modifyCoercion requests with script tags or JavaScript code in parameters
- Multiple failed login attempts following XSS payload requests
Network Indicators:
- HTTP requests to modifyCoercion with suspicious parameters
- Outbound connections to unknown domains after XSS execution
SIEM Query:
source="meddream_logs" AND uri="*modifyCoercion*" AND (param="*<script>*" OR param="*javascript:*")