What is CVE-2023-40612?

CVE-2023-40612 is a medium-severity vulnerability in Opennms Horizon, classified under XML Injection (Blind XPath Injection). CVSS score: 5.3/10. Published 2023-08-23.

How severe is CVE-2023-40612?

Medium severity. CVSS v3 base score is 5.3 out of 10.

XPath Injection in Opennms Horizon

CVE-2023-40612

In OpenMNS Horizon 31.0.8 and versions earlier than 32.0.2, the file editor which is accessible to any user with ROLE_FILESYSTEM_EDITOR privileges is vulnerable to XXE injection attacks. 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.

Published 2023-08-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:L/I:H/A:L.

EPSS exploit prediction

EPSS: 0.004 (34.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Opennms Horizon
Opennms Meridian
The Opennms Group Horizon — versions 31.0.8, 0
The Opennms Group Meridian — versions 2023.0.0, 0

Weakness classification (CWE)

CWE-91 — XML Injection (Blind XPath Injection)

References

github.com/OpenNMS/opennms/pull/6288 (Patch)
docs.opennms.com/meridian/2023/releasenotes/changelog.html (Release Notes)

Frequently asked questions

What is CVE-2023-40612?: CVE-2023-40612 is a medium-severity vulnerability in Opennms Horizon, classified under XML Injection (Blind XPath Injection). CVSS score: 5.3/10. Published 2023-08-23.
How severe is CVE-2023-40612?: Medium severity. CVSS v3 base score is 5.3 out of 10.