Stored Cross-Site Scripting in OPNsense Product by Deciso
CVE-2019-25369

5.1MEDIUM

Key Information:

Vendor

Opnsense

Status
Opnsense
Vendor
CVE Published:
15 February 2026

Badges

👾 Exploit Exists

What is CVE-2019-25369?

OPNsense version 19.1 contains a stored cross-site scripting vulnerability located in the system_advanced_sysctl.php endpoint. This security flaw allows attackers to inject persistent malicious scripts by submitting POST requests with script payloads through the tunable parameter. Once the payload is stored, it is executed in the context of authenticated user sessions when the affected page is accessed, potentially compromising user data and the integrity of the system.

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:
Low
Integrity:
Low
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
.