OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by exploiting insufficient input validation in the host parameter. Attackers can submit crafted payloads through POST requests to diag_traceroute.php to execute arbitrary JavaScript in the context of a user's browser session.

Project Subscriptions

Vendors Products
Opnsense Subscribe
Opnsense Subscribe
Advisories

No advisories yet.

Fixes

Solution

OPNsense 19.1.1 released


Workaround

No workaround given by the vendor.

History

Sun, 15 Feb 2026 14:15:00 +0000

Type Values Removed Values Added
Description OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by exploiting insufficient input validation in the host parameter. Attackers can submit crafted payloads through POST requests to diag_traceroute.php to execute arbitrary JavaScript in the context of a user's browser session.
Title OPNsense 19.1 Reflected XSS via diag_traceroute.php
First Time appeared Opnsense
Opnsense opnsense
Weaknesses CWE-79
CPEs cpe:2.3:a:opnsense:opnsense:*:*:*:*:*:*:*:*
Vendors & Products Opnsense
Opnsense opnsense
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-02-15T13:58:54.354Z

Reserved: 2026-02-15T13:20:23.103Z

Link: CVE-2019-25372

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-02-15T14:16:06.897

Modified: 2026-02-15T14:16:06.897

Link: CVE-2019-25372

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-16T09:42:56Z

Weaknesses