OpenNMS Horizon XXE Injection Vulnerability
XXE injection in /rtc/post/ endpoint in OpenNMS Horizon 31.0.8 and versions earlier than 32.0.2 on multiple platforms is vulnerable to XML external entity (XXE) injection, which can be used for instance to force Horizon to make arbitrary HTTP requests to internal and external services. 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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.opennms.core:org.opennms.core.xml | >= 31.0.8, < 32.0.2 | 32.0.2 |
References
- CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L- Weakness (CWE)
CWE-611- Platform
- Java / Kotlin (Maven)
- Package
org.opennms.core:org.opennms.core.xml- Disclosed
- 11.08.2023
- Updated
- 11.10.2026 11:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-2qc8-r663-v864 - CC BY 4.0
Vulnerability history: org.opennms.core:org.opennms.core.xml
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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