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    CVE-2019-25375

    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.

    Published:Feb 15, 2026
    Last Modified:Mar 5, 2026
    EPS:Feb 15, 2026
    EPSS Score:0.00021
    CVSS Score:6.1

    Affected Products

    Vendor
    Opnsense
    Product
    Opnsense

    Exploits

    https://www.exploit-db.com/exploits/46351

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High