Reflected Cross-Site Scripting Vulnerability in OPNsense by Deciso
CVE-2019-25376

5.1MEDIUM

Key Information:

Vendor

Opnsense

Status
Opnsense
Vendor
CVE Published:
15 February 2026

Badges

👾 Exploit Exists

What is CVE-2019-25376?

In OPNsense 19.1, a reflected cross-site scripting vulnerability enables unauthorized attackers to inject harmful scripts via the 'ignoreLogACL' parameter. By crafting specific payloads and sending POST requests to the proxy endpoint, attackers can execute arbitrary JavaScript code in users' browsers, potentially leading to data theft, session hijacking, or other malicious exploits.

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
.