CVE-2025-65231: Barix Instreamer v04.06 and earlier is vulnerable to Cross Site Scripting (XSS) in the Web UI I/O & Serial con

Q: How do I fix CVE-2025-65231?

instreamer firmware: upgrade to newer than 4.06. Exact commands for each OS are on this page.

Q: Is CVE-2025-65231 being exploited?

CVE-2025-65231 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-65231 affect?

CVE-2025-65231 affects instreamer firmware. Severity is medium (CVSS 6.1). 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.

Q: How urgent is CVE-2025-65231?

Priority 30/100. Public exploit reference

Routine

MEDIUM 6.1UPGRADE

CVE-2025-65231 is a medium-severity flaw (CVSS 6.1) affecting instreamer firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.1 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-79
Published	2025-12-08
Last modified	2026-10-14

Publisher (CNA): MITRE · Vendor: barix

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-12-08 19:15 UTCPublished CVE record published
2026-10-14 22:10 UTCUpdated Record last modified

barix instreamer firmware UPGRADE

Affected: <= 4.06

Fixed in: newer than 4.06

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-65231?

instreamer firmware: upgrade to newer than 4.06. Exact commands for each OS are on this page.

Is CVE-2025-65231 being exploited?

CVE-2025-65231 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-65231 affect?

CVE-2025-65231 affects instreamer firmware. Severity is medium (CVSS 6.1). 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.

How urgent is CVE-2025-65231?

Priority 30/100. Public exploit reference

Related CVEs

CVE-2025-65230 MEDIUM 5.4 MITIGATE Barix Instreamer v04.06 and v04.05 contains a stored cross-site scripting (XSS) vulnerability in the Web UI Co

References

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