CVE-2025-53854
📋 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 management. 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
Attackers steal administrator credentials, gain full system access, exfiltrate sensitive patient data, and potentially modify medical imaging data.
Likely Case
Attackers steal user session cookies to impersonate legitimate users, access patient records, or perform unauthorized actions within the PACS system.
If Mitigated
Limited impact due to proper input validation, output encoding, and Content Security Policy preventing script execution.
🎯 Exploit Status
Reflected XSS requires user interaction but is trivial to weaponize in phishing campaigns. No authentication required to trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
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
Implement WAF Rules
allDeploy web application firewall rules to block XSS payloads targeting modifyHL7Route parameter
# WAF rule example: Block scripts in modifyHL7Route parameter
# ModSecurity: SecRule ARGS:modifyHL7Route "@rx <script" "id:1001,phase:2,deny,msg:'XSS attempt'"
Content Security Policy
allImplement strict Content Security Policy headers to prevent inline script execution
# Apache: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
# Nginx: add_header Content-Security-Policy "default-src 'self'; script-src 'self';";
🧯 If You Can't Patch
- Disable or restrict access to modifyHL7Route functionality if not required
- Implement input validation and output encoding for all user-supplied data in modifyHL7Route
🔍 How to Verify
Check if Vulnerable:
Test modifyHL7Route parameter with XSS payload: <script>alert('XSS')</script> and check if script executesCheck Version:
Check MedDream PACS version in administration interface or configuration filesVerify Fix Applied:
Retest with same XSS payloads and verify scripts do not execute. Check that input is properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual modifyHL7Route parameter values containing script tags or JavaScript code
- Multiple failed attempts with suspicious parameter values
Network Indicators:
- HTTP requests to modifyHL7Route with script tags in parameters
- Unusual referrer headers in requests
SIEM Query:
source="web_logs" AND uri="*modifyHL7Route*" AND (param="*<script*" OR param="*javascript:*" OR param="*onerror=*" OR param="*onload=*")