CVE-2017-12623: Apache Nifi

Medium severity, CVSS 6.5. EPSS: 1.9% chance of exploitation in the next 30 days.

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.

Affected products

• Apache Nifi: version 1.0.0 only; version 1.0.1 only; version 1.1.0 only; version 1.1.1 only; version 1.1.2 only; version 1.2.0 only; …

Published 2017-10-10. Last modified 2026-06-17.