{"cve":"CVE-2020-21487","nvd":{"published":"2023-04-04T15:15:08.147","modified":"2026-06-17T03:03:43.050","status":"Modified","description":"Cross Site Scripting vulnerability found in Netgate pfSense 2.4.4 and ACME package v.0.6.3 allows attackers to execute arbitrary code via the RootFolder field of acme_certificates.php.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","score":9.6},"cwes":["CWE-79"],"references":["https://github.com/pfsense/FreeBSD-ports/commit/a6f443cde51e7fcf17e51f16014d3589253284d8","https://redmine.pfsense.org/issues/9888","https://github.com/pfsense/FreeBSD-ports/commit/a6f443cde51e7fcf17e51f16014d3589253284d8","https://redmine.pfsense.org/issues/9888"],"products":["netgate:pfsense","netgate:pfsense_acme_package"],"source":"nvd","synced_at":"2026-10-19T21:37:48.383111019+00:00"},"epss":{"cve":"CVE-2020-21487","score":0.00666,"percentile":0.51855,"date":"2026-10-31"},"kev":null,"osv":[],"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."]}