CVE-2025-40772
📋 TL;DR
A stored Cross-Site Scripting vulnerability in SiPass integrated allows attackers to inject malicious scripts that execute when other users visit affected pages. This enables session hijacking, account impersonation, and potential privilege escalation. All SiPass integrated versions before V3.0 are affected.
💻 Affected Systems
- SiPass integrated
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of user accounts, privilege escalation to administrative roles, and full control over the access control system.
Likely Case
Session hijacking leading to unauthorized access to user accounts and potential data theft.
If Mitigated
Limited impact with proper input validation and output encoding in place.
🎯 Exploit Status
Stored XSS typically requires attacker to have some level of access to inject payloads.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V3.0 or later
Vendor Advisory: https://cert-portal.siemens.com/productcert/html/ssa-599451.html
Restart Required: Yes
Instructions:
1. Download SiPass integrated V3.0 or later from Siemens support portal. 2. Backup current configuration and data. 3. Install the updated version following vendor documentation. 4. Restart the application server.
🔧 Temporary Workarounds
Input Validation Filtering
allImplement server-side input validation to reject or sanitize malicious script content.
Content Security Policy
allDeploy CSP headers to restrict script execution sources.
Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Implement web application firewall rules to block XSS payloads.
- Restrict user permissions to minimize injection points and monitor for suspicious activity.
🔍 How to Verify
Check if Vulnerable:
Check SiPass integrated version in administration interface or configuration files.Check Version:
Check application interface or consult vendor documentation for version command.Verify Fix Applied:
Verify version is V3.0 or later and test for XSS using security scanning tools.📡 Detection & Monitoring
Log Indicators:
- Unusual input patterns containing script tags or JavaScript in user submissions.
- Multiple failed login attempts from unexpected locations after XSS injection.
Network Indicators:
- HTTP requests containing suspicious script payloads in parameters.
- Unexpected outbound connections from the application server.
SIEM Query:
source="sipass_logs" AND (message="*<script>*" OR message="*javascript:*")