CVE-2023-40313Network attack vector

Remote code execution via BeanShell server listener

Published Aug 17, 2023 · Updated Oct 8, 2024

Code injection in OpenNMS Horizon before 32.0.2 and affected Meridian releases allows remote attackers to execute arbitrary Java code. The example scriptd configuration invokes BeanShell server(12345), opening a remote interpreter listener that evaluates client-submitted Java. Exploitation requires network access to TCP port 12345, which installation guidance confines to a protected intranet.

CVSS severity7.1
High
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in OpenNMS Horizon before 32.0.2 and affected Meridian releases allows remote attackers to execute arbitrary Java code. The example scriptd configuration invokes BeanShell server(12345), opening a remote interpreter listener that evaluates client-submitted Java. Exploitation requires network access to TCP port 12345, which installation guidance confines to a protected intranet.

The record

CVE
CVE-2023-40313
Published
Aug 17, 2023
Updated
Oct 8, 2024
Vendor
The OpenNMS Group, Inc.
Product
OpenNMS Meridian
Classifications
CWE-94, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 17, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 8, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2020.0.0 <=2020.1.37
  2. Affected versionversion=2021.0.0 <=2021.1.29
  3. Affected versionversion=2022.0.0 <=2022.1.18
  4. Affected versionversion=2023.0.0 <=2023.1.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The OpenNMS Group, Inc. · OpenNMS Meridianversion=2020.0.0 <=2020.1.37; version=2021.0.0 <=2021.1.29; version=2022.0.0 <=2022.1.18; version=2023.0.0 <=2023.1.5
The OpenNMS Group, Inc. · OpenNMS Horizonversion=29.0.4 <32.0.2

Published CVSS scores

8.8NIST NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.1GitHub Advisory DatabaseCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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