CVE-2019-25369 MEDIUM

CVE-2019-25369: OPNsense 19.1 Stored XSS via system_advanced_sysctl.php

Vendor Opnsense
Product OPNsense
Weakness CWE-79 · XSS
Published February 15, 2026
Last update March 5, 2026
View on NVD All CVEs

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction —
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 15, 2026 CVE published
March 5, 2026 Record updated