CVE-2025-54862
📋 TL;DR
Sante PACS Server web portal contains a stored cross-site scripting vulnerability that allows attackers to inject malicious HTML. When exploited, this can redirect users to malicious websites and steal session cookies. Healthcare organizations using vulnerable Sante PACS Server versions are affected.
💻 Affected Systems
- Sante PACS Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator session cookies, gain full system access, compromise patient data, and potentially pivot to other hospital systems.
Likely Case
Attackers steal user session cookies to access patient records, modify data, or perform unauthorized actions within the PACS system.
If Mitigated
Limited impact with proper input validation and output encoding, though some user inconvenience from malicious redirects may still occur.
🎯 Exploit Status
Requires attacker to have access to inject malicious HTML into the web portal; stored XSS means payload persists and affects multiple users.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.santesoft.com/security (example - actual URL should be verified)
Restart Required: No
Instructions:
1. Contact Sante support for patch availability 2. Apply vendor-provided security update 3. Test in non-production environment first 4. Deploy to production systems during maintenance window
🔧 Temporary Workarounds
Implement Web Application Firewall
allDeploy WAF with XSS protection rules to block malicious HTML injection attempts
Content Security Policy
webImplement strict CSP headers to prevent execution of unauthorized scripts
Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Isolate Sante PACS Server behind network segmentation with strict access controls
- Implement additional authentication layers and session management controls
🔍 How to Verify
Check if Vulnerable:
Review web portal for unescaped user input fields; test with safe payloads like <script>alert('test')</script> in input fieldsCheck Version:
Check Sante PACS Server administration panel or consult vendor documentation for version commandVerify Fix Applied:
Verify patch installation via version check; retest XSS payloads to confirm they are properly sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual HTML/script tags in user input logs
- Multiple redirects to external domains
- Suspicious cookie access patterns
Network Indicators:
- Outbound connections to unknown domains following portal access
- Unusual traffic patterns from PACS web server
SIEM Query:
source="pacs-web.log" AND ("<script>" OR "javascript:" OR "onload=" OR "onerror=")