CVE-2026-1819
📋 TL;DR
This stored XSS vulnerability in Karel Electronics ViPort allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. All ViPort installations through version 23012026 are affected, potentially compromising user sessions and data.
💻 Affected Systems
- Karel Electronics ViPort
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, take full control of the ViPort system, pivot to internal networks, and deploy ransomware or exfiltrate sensitive data.
Likely Case
Attackers will steal user session cookies to impersonate legitimate users, modify system configurations, and potentially access sensitive industrial control data.
If Mitigated
With proper input validation and output encoding, the attack surface is reduced, though the vulnerability still exists in the codebase.
🎯 Exploit Status
XSS vulnerabilities typically have low exploitation complexity once the vulnerable endpoint is identified. The CWE-79 classification indicates this is a classic web application vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.usom.gov.tr/bildirim/tr-26-0017
Restart Required: No
Instructions:
1. Contact Karel Electronics for patch availability. 2. If patch is available, download from vendor portal. 3. Apply patch following vendor instructions. 4. Test functionality after patching.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with XSS protection rules to block malicious payloads before they reach the application.
Input Validation Filter
allImplement server-side input validation to sanitize user inputs before processing.
🧯 If You Can't Patch
- Isolate ViPort systems from internet access and restrict to internal network only
- Implement strict Content Security Policy (CSP) headers to limit script execution
🔍 How to Verify
Check if Vulnerable:
Test web interfaces for XSS by attempting to inject script payloads into input fields and observing if they execute when viewed.Check Version:
Check system web interface or configuration files for version information (exact command depends on ViPort implementation)Verify Fix Applied:
After patching, retest the same XSS payloads to confirm they are properly sanitized and no longer execute.📡 Detection & Monitoring
Log Indicators:
- Unusual long strings in HTTP parameters
- Script tags or JavaScript code in user input fields
- Multiple failed login attempts followed by successful login from same IP
Network Indicators:
- HTTP requests containing script tags or JavaScript in parameters
- Unusual outbound connections after user visits specific pages
SIEM Query:
source="viport_logs" AND (message="*<script>*" OR message="*javascript:*" OR message="*onload=*" OR parameter_length>1000)