Stored Cross-Site Scripting Vulnerability in OPNsense by Deciso
CVE-2019-25373

5.1MEDIUM

Key Information:

Vendor

Opnsense

Status
Opnsense
Vendor
CVE Published:
15 February 2026

Badges

👾 Exploit Exists

What is CVE-2019-25373?

OPNsense 19.1 has a vulnerability that enables authenticated attackers to exploit the firewall_rules_edit.php file through stored cross-site scripting. By carefully crafting input for the category parameter, an attacker can send POST requests containing harmful JavaScript code. This malicious script can execute within the browsers of unsuspecting users who visit the affected firewall rule pages, potentially compromising sensitive information and undermining the security of the web application.

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
.