CVE-2023-40313: Opennms Horizon

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

A BeanShell interpreter in remote server mode runs in OpenMNS Horizon versions earlier than 32.0.2 and in related Meridian versions which could allow arbitrary remote Java code execution. The solution is to upgrade to Meridian 2023.1.6, 2022.1.19, 2021.1.30, 2020.1.38 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.

Affected products

• Opennms Horizon: before 32.0.2 (fixed in 32.0.2)
• Opennms Meridian: before 2020.1.38 (fixed in 2020.1.38); from 2021.1.0, before 2021.1.30 (fixed in 2021.1.30); from 2022.1.0, before 2022.1.19 (fixed in 2022.1.19); from 2023.1.0, before 2023.1.6 (fixed in 2023.1.6)

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