CVE-2019-25375

OPNsense 19.1 Reflected XSS via monit interface

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

6.1MEDIUM

Description

OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by submitting crafted input to the mailserver parameter. Attackers can send POST requests to the monit interface with JavaScript payloads in the mailserver parameter to execute arbitrary code in users' browsers.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

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

exploit-db.com

https://opnsense.org

opnsense.org

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

forum.opnsense.org

and 1 more references View all →

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Exploit details & PoC links

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