Reflected Cross-Site Scripting Vulnerability in OPNsense by Deciso
CVE-2019-25370

5.1MEDIUM

Key Information:

Vendor

Opnsense

Status
Opnsense
Vendor
CVE Published:
15 February 2026

Badges

👾 Exploit Exists

What is CVE-2019-25370?

OPNsense version 19.1 is vulnerable to a reflected cross-site scripting (XSS) flaw, which allows attackers to inject malicious scripts into the web interface. By submitting specially crafted input through various parameters such as 'tag', 'descr', or 'vlanif' in POST requests to the interfaces_vlan_edit.php page, an attacker can execute arbitrary JavaScript code in the context of the victim's browser. This can lead to unauthorized actions or data theft from users interacting with the compromised interface.

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
.