CVE-2019-25373
Unknown Unknown - Not Provided
Stored XSS in OPNsense firewall_rules_edit.php Allows Script Injection

Publication date: 2026-02-15

Last updated on: 2026-02-18

Assigner: VulnCheck

Description
OPNsense 19.1 contains a stored cross-site scripting vulnerability that allows authenticated attackers to inject malicious scripts by submitting crafted input to the category parameter. Attackers can send POST requests to firewall_rules_edit.php with script payloads in the category field to execute arbitrary JavaScript in the browsers of other users accessing firewall rule pages.
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Meta Information
Published
2026-02-15
Last Modified
2026-02-18
Generated
2026-06-16
AI Q&A
2026-02-15
EPSS Evaluated
2026-06-15
NVD
CVE-2019-25373
EUVD
EUVD-2019-19422
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
opnsense opnsense 19.1
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
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Executive Summary

This vulnerability is a stored cross-site scripting (XSS) issue in OPNsense 19.1. It allows authenticated attackers to inject malicious JavaScript code by submitting specially crafted input to the 'category' parameter. Specifically, attackers can send POST requests to the firewall_rules_edit.php page with script payloads in the category field. When other users access the firewall rule pages, the injected scripts execute in their browsers.

Impact Analysis

This vulnerability can impact users by enabling attackers to execute arbitrary JavaScript in the browsers of other users who access the affected firewall rule pages. This can lead to unauthorized actions performed on behalf of those users, theft of sensitive information such as session tokens, or other malicious activities that compromise user security and privacy.

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