{"id":"CVE-2021-25933","aliases":["GHSA-jjhw-5mxp-2g2q"],"url":"https://o3.security/vulnerability/CVE-2021-25933","summary":"Cross-site Scripting in OpenNMS Horizon","details":"In OpenNMS Horizon, versions opennms-1-0-stable through opennms-27.1.0-1; OpenNMS Meridian, versions meridian-foundation-2015.1.0-1 through meridian-foundation-2019.1.18-1; meridian-foundation-2020.1.0-1 through meridian-foundation-2020.1.6-1 are vulnerable to Stored Cross-Site Scripting, since the function `validateFormInput()` performs improper validation checks on the input sent to the `groupName` and `groupComment` parameters. Due to this flaw, an authenticated attacker could inject arbitrary script and trick other admin users into downloading malicious files which can cause severe damage to the organization using opennms.","published":"2021-05-20T15:15:07.720Z","modified":"2026-07-09T00:13:53.289223Z","cvss":{"score":4.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Maven","name":"org.opennms:opennms","fixedVersion":"27.1.1"}],"fix":{"url":"https://github.com/OpenNMS/opennms/commit/8a97e6869d6e49da18b208c837438ace80049c01%2C","label":"OpenNMS/opennms@8a97e68"},"references":[{"type":"FIX","url":"https://github.com/OpenNMS/opennms/commit/8a97e6869d6e49da18b208c837438ace80049c01%2C"},{"type":"FIX","url":"https://github.com/OpenNMS/opennms/commit/eb08b5ed4c5548f3e941a1f0d0363ae4439fa98c"},{"type":"FIX","url":"https://github.com/OpenNMS/opennms/commit/f3ebfa3da5352b4d57f238b54c6db315ad99f10e"},{"type":"EVIDENCE","url":"https://www.whitesourcesoftware.com/vulnerability-database/CVE-2021-25933"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T00:13:53.289223Z"}}