CVE-2019-25374
Reflected XSS in OPNsense vpn_ipsec_settings.php Enables Code Execution
Publication date: 2026-02-15
Last updated on: 2026-02-18
Assigner: VulnCheck
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| opnsense | opnsense | 19.1 |
Helpful Resources
Exploitability
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a reflected cross-site scripting (XSS) issue in OPNsense 19.1. It occurs because the application does not properly sanitize the passthrough_networks parameter in the vpn_ipsec_settings.php page. Attackers can send specially crafted POST requests containing malicious JavaScript code in this parameter, which then gets executed in the browsers of users who access the affected page.
How can this vulnerability impact me? :
This vulnerability can allow attackers to execute arbitrary JavaScript code in the context of a user's browser. This can lead to theft of sensitive information such as session cookies, user credentials, or other data accessible through the browser. It may also enable attackers to perform actions on behalf of the user or deliver further malicious payloads.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know