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CVE

CWE

Training

CVE-2019-25377

Published: Feb 15, 2026

Modified: May 24, 2026

PUBLISHED

CVSS v3.1

5.4

MEDIUM

Description

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.

Vendor	Product	Versions
Opnsense	OPNsense	affected `19.1`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

References

ExploitDB-46351

exploit

OPNsense Official Website

product

OPNsense 19.1.1 Release Announcement

patch

VulnCheck Advisory: OPNsense 19.1 Reflected XSS via system_advanced_sysctl.php

third-party-advisory

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