CVE-2023-40314: Opennms Horizon

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

Cross-site scripting in bootstrap.jsp in multiple versions of OpenNMS Meridian and Horizon allows an attacker access to confidential session information. The solution is to upgrade to Horizon 32.0.5 or newer and Meridian 2023.1.9 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 Moshe Apelbaum for reporting this issue.

Affected products

• Opennms Horizon: before 32.0.5 (fixed in 32.0.5)
• Opennms Meridian: before 2023.1.9 (fixed in 2023.1.9)

Published 2023-11-16. Last modified 2026-06-17.