CVE-2023-40315: Opennms Horizon

High severity, CVSS 8.0. EPSS: 2.9% chance of exploitation in the next 30 days.

In OpenMNS Horizon 31.0.8 and versions earlier than 32.0.2 and related Meridian versions, any user that has the ROLE_FILESYSTEM_EDITOR can easily escalate their privileges to ROLE_ADMIN or any other role. 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 products

• Opennms Horizon: from 31.0.8, before 32.0.2 (fixed in 32.0.2)
• Opennms Meridian: from 2023.0.0, before 2023.1.5 (fixed in 2023.1.5)

Published 2023-08-17. Last modified 2026-06-17.