CVE-2025-46270
📋 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 the vulnerable version of the medical imaging software. The vulnerability enables client-side attacks against authenticated users.
💻 Affected Systems
- MedDream PACS Premium
📦 What is this software?
Pacs Server by Meddream
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on user systems.
Likely Case
Session hijacking, credential theft, or redirection to phishing sites targeting healthcare staff.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, though user interaction is still required.
🎯 Exploit Status
Exploitation requires crafting malicious URLs and social engineering to get users to click them.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Contact MedDream vendor for patch information. 2. Apply vendor-provided security update. 3. Test in non-production environment first.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement proper input validation and output encoding for the fetchPriorStudies parameter
Implement server-side validation of URL parameters
Apply HTML entity encoding to user-controlled output
Content Security Policy
allImplement strict Content Security Policy headers to mitigate XSS impact
Add Content-Security-Policy header with script-src directives
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads
- Restrict access to the vulnerable endpoint using network segmentation
🔍 How to Verify
Check if Vulnerable:
Test the fetchPriorStudies endpoint with XSS payloads in URL parametersCheck Version:
Check MedDream PACS version in administration interface or configuration filesVerify Fix Applied:
Verify that XSS payloads are properly sanitized and do not execute📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters containing script tags or JavaScript in fetchPriorStudies requests
- Multiple failed XSS attempts
Network Indicators:
- HTTP requests with suspicious parameters to fetchPriorStudies endpoint
- URLs containing encoded JavaScript payloads
SIEM Query:
source="web_logs" AND uri="*fetchPriorStudies*" AND (param="*<script>*" OR param="*javascript:*")