What’s Vulnerable › Vulnerabilities

CVE-2023-40612: Authenticated XXE Injection Via The File Editor

• Severity: high (CVSS 8.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-08-23 · updated 2026-06-17
• Weakness: CWE-91

Description

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.

Affected products

• The OpenNMS Group Horizon: from 31.0.8 before 32.0.2 — fixed in 32.0.2
• The OpenNMS Group Meridian: from 2023.0.0 before 2023.1.5 — fixed in 2023.1.5

How to fix

Upgrade to a fixed version: The OpenNMS Group Horizon 32.0.2; The OpenNMS Group Meridian 2023.1.5. Check the vendor advisory for mitigations.

References

• https://docs.opennms.com/meridian/2023/releasenotes/changelog.html#releasenotes-changelog-Meridian-2023.1.5
• https://github.com/OpenNMS/opennms/pull/6288
• https://docs.opennms.com/meridian/2023/releasenotes/changelog.html#releasenotes-changelog-Meridian-2023.1.5
• https://github.com/OpenNMS/opennms/pull/6288

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