{"cve":"CVE-2020-12760","nvd":{"published":"2020-05-11T16:15:13.147","modified":"2026-06-17T02:52:15.197","status":"Modified","description":"An issue was discovered in OpenNMS Horizon before 26.0.1, and Meridian before 2018.1.19 and 2019 before 2019.1.7. The ActiveMQ channel configuration allowed for arbitrary deserialization of Java objects (aka ActiveMQ Minion payload deserialization), leading to remote code execution for any authenticated channel user regardless of its assigned permissions.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-502"],"references":["https://github.com/OpenNMS/opennms/releases/tag/opennms-26.0.1-1","https://issues.opennms.org/browse/NMS-12673","https://www.opennms.com/en/blog/2020-04-29-opennms-horizon-26-0-1-luchador-released/","https://www.opennms.com/en/blog/2020-04-29-opennms-meridian-2018-1-18-wildfire-released/","https://www.opennms.com/en/blog/2020-04-29-opennms-meridian-2019-1-6-europa-released/"],"products":["opennms:opennms_horizon","opennms:opennms_meridian"],"source":"nvd","synced_at":"2026-10-19T21:04:18.695612450+00:00"},"epss":{"cve":"CVE-2020-12760","score":0.03456,"percentile":0.8903,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-853f-x27w-8r74","url":"https://osv.dev/vulnerability/GHSA-853f-x27w-8r74","summary":"OpenNMS Horizon RCE via Unsafe Deserialization","modified":"2023-11-08T04:02:11.834573Z","packages":[{"ecosystem":"Maven","name":"org.opennms.core:org.opennms.core.daemon","purl":"pkg:maven/org.opennms.core/org.opennms.core.daemon","ranges":["<26.0.1"],"fixed":["26.0.1"]}]}],"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."]}