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.
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'}


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

No data.