CVE-2025-57881
📋 TL;DR
A reflected cross-site scripting vulnerability in MedDream PACS Premium's modifyEmail functionality allows attackers to execute arbitrary JavaScript by tricking users into clicking malicious URLs. This affects MedDream PACS Premium 7.3.6.870 installations. Users who access crafted URLs are vulnerable to session hijacking, credential theft, or redirection to malicious sites.
💻 Affected Systems
- MedDream PACS Premium
📦 What is this software?
Pacs Server by Meddream
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals administrator credentials, gains full system access, exfiltrates sensitive medical data, and deploys ransomware across the healthcare network.
Likely Case
Attacker steals user session cookies to impersonate legitimate users, accesses patient records, or redirects users to phishing sites to harvest credentials.
If Mitigated
With proper input validation and output encoding, the vulnerability is prevented; with web application firewalls, malicious requests are blocked before reaching the application.
🎯 Exploit Status
Exploitation requires user interaction (clicking a malicious link), but crafting the URL is straightforward based on the CWE-79 pattern.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
1. Monitor MedDream vendor channels for security updates. 2. Apply the official patch once released. 3. Test the patch in a non-production environment first.
🔧 Temporary Workarounds
Implement Input Validation and Output Encoding
allSanitize and encode user inputs in the modifyEmail functionality to prevent JavaScript execution.
Not applicable - requires code changes
Deploy Web Application Firewall (WAF)
allConfigure WAF rules to block requests containing malicious scripts targeting the modifyEmail endpoint.
Not applicable - configuration dependent
🧯 If You Can't Patch
- Disable or restrict access to the modifyEmail functionality if not essential.
- Implement Content Security Policy (CSP) headers to mitigate XSS impact.
🔍 How to Verify
Check if Vulnerable:
Test the modifyEmail endpoint with XSS payloads (e.g., <script>alert('XSS')</script>) and check if they execute in the browser.Check Version:
Check the MedDream PACS Premium version in the application interface or configuration files.Verify Fix Applied:
After applying fixes, retest with XSS payloads to ensure they are properly sanitized or blocked.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to modifyEmail with suspicious parameters containing script tags or JavaScript code.
- Unusual user activity following access to crafted URLs.
Network Indicators:
- Incoming requests with encoded or obfuscated JavaScript in URL parameters.
- Outbound connections to unknown domains triggered by XSS payloads.
SIEM Query:
source="web_logs" AND uri="*modifyEmail*" AND (param="*<script>*" OR param="*javascript:*")