CVE-2019-25377CWE-79

OPNsense 19.1 Reflected XSS via system_advanced_sysctl.php

Medium · published February 15, 2026

CVSS v4.0
4.8
EPSS
0%
Percentile
19.4
In the wild
Unconfirmed
What it is

OPNsense 19.1 contains a reflected cross-site scripting vulnerability in the system_advanced_sysctl.php endpoint that allows attackers to inject malicious scripts via the value parameter. Attackers can craft POST requests with script payloads in the value parameter to execute JavaScript in the context of authenticated user sessions.

The record
Technical detail
CVSS v4.0
4.8 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00280 · 19.4th 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 system_advanced_sysctl.php
    cvelistv5