CVE-2025-65231
📋 TL;DR
Barix Instreamer v04.06 and earlier contains a stored cross-site scripting (XSS) vulnerability in the Web UI's I/O & Serial configuration page. Attackers can inject malicious scripts via the CTS close command field, which are then executed when the Status page loads. This affects administrators and users accessing the vulnerable web interface.
💻 Affected Systems
- Barix Instreamer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker could steal administrator session cookies, perform actions as the administrator, or redirect users to malicious sites, potentially leading to full device compromise.
Likely Case
Attackers with access to the configuration page could inject scripts that steal credentials or session tokens from administrators viewing the Status page.
If Mitigated
With proper input validation and output encoding, the malicious scripts would be rendered harmless as text rather than executed.
🎯 Exploit Status
Exploitation requires authenticated access to the configuration page but uses simple XSS payloads.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://help.barix.com/instreamer/user-manual
Restart Required: No
Instructions:
Check vendor website for security updates. If available, download and apply the latest firmware version following Barix's update procedures.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement server-side validation and sanitization of user input in the CTS close command field.
Output Encoding
allApply proper output encoding when rendering user-controlled data on the Status page.
🧯 If You Can't Patch
- Restrict access to the Web UI using network segmentation and firewall rules.
- Implement Content Security Policy (CSP) headers to mitigate XSS impact.
🔍 How to Verify
Check if Vulnerable:
Access the Web UI, navigate to I/O & Serial configuration, and attempt to inject a simple XSS payload like <script>alert('XSS')</script> in the CTS close command field. Then check if it executes on the Status page.Check Version:
Check the firmware version in the Web UI's system information or status page.Verify Fix Applied:
After applying fixes, repeat the injection test to confirm the payload is sanitized and does not execute.📡 Detection & Monitoring
Log Indicators:
- Unusual input patterns in configuration logs, especially script tags or JavaScript in CTS close command fields.
Network Indicators:
- HTTP requests containing XSS payloads to configuration endpoints.
SIEM Query:
source="web_logs" AND (uri="/config/io_serial" OR uri="/status") AND (message CONTAINS "<script>" OR message CONTAINS "javascript:")