CVE-2019-25377

OPNsense 19.1 Reflected XSS via system_advanced_sysctl.php

Published: Feb 15, 2026Updated: Feb 18, 2026 Sources: CVE List NVDCWE-79

5.4MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:RUser Interaction

Required

Scope

S:CScope

Changed

Impact

C:LConfidentiality

Low

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-79

Affected Products

Opnsense

oss-project

OPNsenseOn-prem

Networking Infrastructure / firewall

and 1 more affected products View all →

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Execution

Initial Access

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References

https://forum.opnsense.org/index.php?topic=11469.0

forum.opnsense.org

https://opnsense.org

opnsense.org

https://www.exploit-db.com/exploits/46351

exploit-db.com

and 1 more references View all →

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Exploit details & PoC links

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