Home/CVE/OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject ma
CVE

CVE-2019-25375

OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject ma

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.

MEDIUM · CVSS 6.1 EPSS 0.00036
Schedule remediation
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
▤

Affected Products & Versions

1
opnsenseall versions
⚠

Public Exploits & PoCs

1
pocwww.exploit-db.com · 46351www.exploit-db.com
▣

Scoring & Timeline

6.1
MEDIUM · CVSS v3.1 · disclosure@vulncheck.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Feb 2026 · 02:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://forum.opnsense.org/index.php?topic=11469.0Release Notes
https://opnsense.orgProduct
https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-monit-interfaceThird Party Advisory
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