{"cve":"CVE-2023-0871","nvd":{"published":"2023-08-11T17:15:08.980","modified":"2026-06-17T05:26:31.560","status":"Modified","description":"XXE injection in /rtc/post/ endpoint in OpenMNS 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. OpenNMS thanks Erik Wynter and Moshe Apelbaum for reporting this issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-611"],"references":["https://docs.opennms.com/horizon/32/releasenotes/changelog.html","https://github.com/OpenNMS/opennms/pull/6355","https://docs.opennms.com/horizon/32/releasenotes/changelog.html","https://github.com/OpenNMS/opennms/pull/6355"],"products":["opennms:horizon","opennms:meridian"],"source":"nvd","synced_at":"2026-10-19T21:39:14.809778102+00:00"},"epss":{"cve":"CVE-2023-0871","score":0.00547,"percentile":0.4588,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2qc8-r663-v864","url":"https://osv.dev/vulnerability/GHSA-2qc8-r663-v864","summary":"OpenNMS Horizon XXE Injection Vulnerability","modified":"2023-11-08T04:11:12.937400Z","packages":[{"ecosystem":"Maven","name":"org.opennms.core:org.opennms.core.xml","purl":"pkg:maven/org.opennms.core/org.opennms.core.xml","ranges":[">=31.0.8 <32.0.2"],"fixed":["32.0.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}