Advisory Published


First published: Wed Aug 23 2023(Updated: )

In OpenMNS Horizon 31.0.8 and versions earlier than 32.0.2, the file editor which is accessible to any user with ROLE_FILESYSTEM_EDITOR privileges is vulnerable to XXE injection attacks. The solution is to upgrade to Meridian 2023.1.5 or Horizon 32.0.2 or newer. Meridian and Horizon installation instructions state that they are intended for installation within an organization's private networks and should not be directly accessible from the Internet. OpenNMS thanks Erik Wynter for reporting this issue.


Affected SoftwareAffected VersionHow to fix
OpenNMS Horizon>=31.0.8<32.0.2
OpenNMS Meridian>=2023.0.0<2023.1.5

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Frequently Asked Questions

  • What is the vulnerability ID of this vulnerability?

    The vulnerability ID is CVE-2023-40612.

  • What is the severity level of CVE-2023-40612?

    The severity level of CVE-2023-40612 is high (8 out of 10).

  • What is the affected software for CVE-2023-40612?

    The affected software for CVE-2023-40612 are OpenNMS Horizon versions earlier than 32.0.2 and OpenNMS Meridian versions between 2023.0.0 and 2023.1.5.

  • How can I fix CVE-2023-40612?

    To fix CVE-2023-40612, you need to upgrade to Meridian 2023.1.5 or Horizon 32.0.2 or newer.

  • What is XXE injection?

    XXE (XML External Entity) injection is a type of vulnerability that allows an attacker to exploit XML inputs by including external entities.


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