CVE-2019-25371CWE-79

OPNsense 19.1 Reflected XSS via diag_ping.php

Medium · published February 15, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
20.1
In the wild
Unconfirmed
What it is

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 POST requests to the diag_ping.php endpoint with script payloads in the host parameter to execute arbitrary JavaScript in users' browsers.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
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
EPSS
0.00287 · 20.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-02-15T13:58Z
EPSS history
Timeline
  • 15 FEB 13:58Z
    OPNsense 19.1 Reflected XSS via diag_ping.php
    cvelistv5