Is CVE-2023-40314 actively exploited?

No active exploitation of CVE-2023-40314 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2023-40314 be exploited remotely?

Yes. CVE-2023-40314 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2023-40314?

CVE-2023-40314 has a CVSS score of 6.1 (MEDIUM).

HOME VULNERABILITIESCVE-2023-40314

MEDIUM

CVE-2023-40314

CWE-20Published: November 16, 2023· Updated: Jun 17, 2026

6.1

CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2023-40314 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.