Reflected Cross-Site Scripting Vulnerability in OPNsense by Deciso
CVE-2019-25374

5.1MEDIUM

Key Information:

Vendor

Opnsense

Status
Opnsense
Vendor
CVE Published:
15 February 2026

Badges

👾 Exploit Exists

What is CVE-2019-25374?

OPNsense version 19.1 has a reflected cross-site scripting vulnerability that can be exploited by attackers through crafted POST requests targeting the passthrough_networks parameter in the vpn_ipsec_settings.php file. This vulnerability allows for the injection of malicious JavaScript payloads, which can then execute arbitrary code within the browsers of users accessing the compromised functionalities. This poses a significant risk as attackers can manipulate and disrupt user sessions, potentially leading to unauthorized access and data breaches.

Affected Version(s)

OPNsense 19.1

References

https://www.exploit-db.com/exploits/46351
exploit
https://opnsense.org
product
https://forum.opnsense.org/index.php?topic=11469.0
patch

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ozer Goker
.