{"cve":"CVE-2017-12623","nvd":{"published":"2017-10-10T18:29:00.197","modified":"2026-06-17T01:03:39.140","status":"Modified","description":"An authorized user could upload a template which contained malicious code and accessed sensitive files via an XML External Entity (XXE) attack. The fix to properly handle XML External Entities was applied on the Apache NiFi 1.4.0 release. Users running a prior 1.x release should upgrade to the appropriate release.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","score":6.5},"cwes":["CWE-611"],"references":["https://nifi.apache.org/security.html#CVE-2017-12623","https://nifi.apache.org/security.html#CVE-2017-12623"],"products":["apache:nifi"],"source":"nvd","synced_at":"2026-10-19T20:46:01.145313090+00:00"},"epss":{"cve":"CVE-2017-12623","score":0.0194,"percentile":0.80121,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-qj7f-j6h9-g5rq","url":"https://osv.dev/vulnerability/GHSA-qj7f-j6h9-g5rq","summary":"XML External Entity Reference in Apache NiFi","modified":"2023-11-08T03:58:53.487680Z","packages":[{"ecosystem":"Maven","name":"org.apache.nifi:nifi","purl":"pkg:maven/org.apache.nifi/nifi","ranges":[">=1.0.0 <1.4.0"],"fixed":["1.4.0"]}]}],"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."]}