CVE-2019-25375
OPNsense 19.1 Reflected XSS via monit interface
- State
- Published
- Severity
- 5.1 Medium
- Published
- Feb 15, 2026
- Updated
- May 24, 2026
- Reserved
- Feb 15, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N | VulnCheck |
| 3.1 | 6.1 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
OPNsenseOpnsense |
|
References
- ExploitDB-46351exploit
- OPNsense Official Websiteproduct
- OPNsense 19.1.1 Release Announcementpatch
- VulnCheck Advisory: OPNsense 19.1 Reflected XSS via monit interfacethird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.