Advisory Published

CVE-2021-25929: XSS

First published: Thu May 20 2021(Updated: )

In OpenNMS Horizon, versions opennms-1-0-stable through opennms-27.1.0-1; OpenNMS Meridian, versions meridian-foundation-2015.1.0-1 through meridian-foundation-2019.1.18-1; meridian-foundation-2020.1.0-1 through meridian-foundation-2020.1.6-1 are vulnerable to Stored Cross-Site Scripting since there is no validation on the input being sent to the `name` parameter in `noticeWizard` endpoint. Due to this flaw an authenticated attacker could inject arbitrary script and trick other admin users into downloading malicious files.


Affected SoftwareAffected VersionHow to fix
OpenNMS Horizon>=1.0<27.1.1
OpenNMS Meridian>=2015.1.0<2019.1.19
OpenNMS Meridian>=2020.1.0<2020.1.7

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Frequently Asked Questions

  • What is the vulnerability ID for this vulnerability?

    The vulnerability ID for this vulnerability is CVE-2021-25929.

  • What is the severity level of CVE-2021-25929?

    CVE-2021-25929 has a severity level of medium (4.8).

  • Which versions of OpenNMS Horizon are affected by CVE-2021-25929?

    OpenNMS Horizon versions opennms-1-0-stable through opennms-27.1.0-1 are affected by CVE-2021-25929.

  • Which versions of OpenNMS Meridian are affected by CVE-2021-25929?

    OpenNMS Meridian versions meridian-foundation-2015.1.0-1 through meridian-foundation-2019.1.18-1 and meridian-foundation-2020.1.0-1 through meridian-foundation-2020.1.6-1 are affected by CVE-2021-25929.

  • How can I fix CVE-2021-25929?

    To fix CVE-2021-25929, it is recommended to update OpenNMS Horizon to version 27.1.1 or higher, or OpenNMS Meridian to version 2019.1.19 or higher for the affected versions.


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