CVE-2019-25369CWE-79

OPNsense 19.1 Stored XSS via system_advanced_sysctl.php

Medium · published February 15, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
14.0
In the wild
Unconfirmed
What it is

OPNsense 19.1 contains a stored cross-site scripting vulnerability in the system_advanced_sysctl.php endpoint that allows attackers to inject persistent malicious scripts via the tunable parameter. Attackers can submit POST requests with script payloads that are stored and executed in the context of authenticated user sessions when the page is viewed.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
EPSS
0.00238 · 14.0th 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 Stored XSS via system_advanced_sysctl.php
    cvelistv5