What is CVE-2017-12632?

CVE-2017-12632 is a high-severity vulnerability in Apache Nifi, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2018-01-23.

How severe is CVE-2017-12632?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Apache Nifi

CVE-2017-12632

A malicious host header in an incoming HTTP request could cause NiFi to load resources from an external server. The fix to sanitize host headers and compare to a controlled whitelist was applied on the Apache NiFi 1.5.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2018-01-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.028 (86.3th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000

Affected products

Apache Nifi
Apache Software Foundation Nifi — versions 1.0.0 - 1.4.0, 0.1.0 - 0.7.x

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

nifi.apache.org/security.html (Vendor Advisory)

Frequently asked questions

What is CVE-2017-12632?: CVE-2017-12632 is a high-severity vulnerability in Apache Nifi, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2018-01-23.
How severe is CVE-2017-12632?: High severity. CVSS v3 base score is 7.5 out of 10.