OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by submitting crafted input to the mailserver parameter. Attackers can send POST requests to the monit interface with JavaScript payloads in the mailserver parameter to execute arbitrary code in users' browsers.
References
| Link | Resource |
|---|---|
| https://forum.opnsense.org/index.php?topic=11469.0 | Release Notes |
| https://opnsense.org | Product |
| https://www.exploit-db.com/exploits/46351 | Exploit Third Party Advisory VDB Entry |
| https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-monit-interface | Third Party Advisory |
Configurations
History
18 Feb 2026, 19:11
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:opnsense:opnsense:19.1:*:*:*:*:*:*:* | |
| References | () https://forum.opnsense.org/index.php?topic=11469.0 - Release Notes | |
| References | () https://opnsense.org - Product | |
| References | () https://www.exploit-db.com/exploits/46351 - Exploit, Third Party Advisory, VDB Entry | |
| References | () https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-monit-interface - Third Party Advisory | |
| First Time |
Opnsense opnsense
Opnsense |
18 Feb 2026, 17:52
| Type | Values Removed | Values Added |
|---|---|---|
| Summary |
|
15 Feb 2026, 14:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-02-15 14:16
Updated : 2026-02-18 19:11
NVD link : CVE-2019-25375
Mitre link : CVE-2019-25375
CVE.ORG link : CVE-2019-25375
JSON object : View
Products Affected
opnsense
- opnsense
CWE
CWE-79
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
