How to fix CVE-2025-65231?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Is Instreamer Firmware affected by CVE-2025-65231?

Organizations using Barix Instreamer v04.06 and earlier should be aware of moderate risk from CVE-2025-65231, a cross-site scripting vulnerability rated CVSS 6.1. Attackers could inject scripts to steal sessions or perform actions as authenticated users. Proof-of-concept code is publicly available.

CVE-2025-65231

EUVD-2025-201805 MEDIUM

2025-12-08 [email protected]

XSS Instreamer Firmware

6.1

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

EUVD ID Assigned

Mar 15, 2026 - 17:54 euvd

EUVD-2025-201805

Analysis Generated

Mar 15, 2026 - 17:54 vuln.today

PoC Detected

Dec 17, 2025 - 15:26 vuln.today

Public exploit code

CVE Published

Dec 08, 2025 - 19:15 nvd

MEDIUM 6.1

DescriptionNVD

Barix Instreamer v04.06 and earlier is vulnerable to Cross Site Scripting (XSS) in the Web UI I/O & Serial configuration page, specifically the CTS close command user-input field which is stored and later rendered on the Status page.

AnalysisAI

Technical ContextAI

Cross-site scripting (XSS) allows injection of client-side scripts into web pages viewed by other users due to insufficient output encoding.

RemediationAI

Encode all user-supplied output contextually (HTML, JS, URL). Implement Content Security Policy (CSP) headers. Use HTTPOnly and Secure cookie flags.

CVE-2025-65231 vulnerability details – vuln.today

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