CVE-2025-57786
📋 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 MedDream PACS Premium version 7.3.6.870, potentially compromising user sessions and data. Healthcare organizations using this medical imaging software are at risk.
💻 Affected Systems
- MedDream PACS Premium
📦 What is this software?
Pacs Server by Meddream
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals authenticated sessions, accesses sensitive medical imaging data, performs actions as authenticated users, and potentially pivots to other systems.
Likely Case
Attacker steals session cookies to impersonate users, accesses patient medical records, and modifies or deletes medical imaging data.
If Mitigated
Limited to session hijacking of users who click malicious links, with proper input validation and output encoding preventing exploitation.
🎯 Exploit Status
Exploit requires crafting malicious URL with JavaScript payload and social engineering to get user to click.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://talosintelligence.com/vulnerability_reports/TALOS-2025-2269
Restart Required: No
Instructions:
1. Monitor vendor for security update. 2. Apply patch when available. 3. Test in non-production environment first.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement proper input validation and output encoding for the notifynewstudy parameter
Implement server-side validation of notifynewstudy parameter
Apply HTML entity encoding to user-controlled output
Content Security Policy
allImplement strict Content Security Policy to mitigate XSS impact
Add Content-Security-Policy header with script-src 'self'
🧯 If You Can't Patch
- Implement web application firewall with XSS protection rules
- Restrict access to MedDream PACS to trusted networks only
🔍 How to Verify
Check if Vulnerable:
Test notifynewstudy parameter with XSS payload: <script>alert('XSS')</script>Check Version:
Check MedDream PACS version in administration interface or configuration filesVerify Fix Applied:
Verify XSS payload no longer executes and is properly encoded in output📡 Detection & Monitoring
Log Indicators:
- Unusual long URLs with script tags in access logs
- Multiple failed XSS attempts
Network Indicators:
- HTTP requests with script tags in notifynewstudy parameter
- Unusual outbound connections after XSS payload execution
SIEM Query:
source="web_logs" AND ("notifynewstudy" AND ("script" OR "javascript:" OR "onerror=" OR "onload="))