CVE-2019-25369

OPNsense 19.1 Stored XSS via system_advanced_sysctl.php

MEDIUM
5.4
CVSS Score
Published: February 15, 2026 at 01:58 PM UTC
Updated: June 17, 2026 at 02:32 AM UTC
1 product affected across 1 vendorOpnsense

Using OPNsense by Opnsense?

Get instant alerts when new vulnerabilities affect OPNsense - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM5.4
Exploit prediction
EPSS 0.2%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

ExploitThird Party AdvisoryVDB Entry
Source: cverecord
https://www.exploit-db.com/exploits/46351
Product
Source: cverecord
https://opnsense.org
PatchRelease Notes
Source: cverecord
https://forum.opnsense.org/index.php?topic=11469.0

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card