How severe is CVE-2017-12632?

CVE-2017-12632 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2017-12632 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2017-12632?

CVE-2017-12632 affects Apache Nifi. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2017-12632?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2017-12632 published?

CVE-2017-12632 was published on 2018-01-23 and last updated on 2026-06-17.

CVE-2017-12632

CVE-2017-12632 is a high-severity vulnerability in Apache Nifi with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apache Nifi
Published: 2018-01-23
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2017-12632?: CVE-2017-12632 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2017-12632 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-12632?: CVE-2017-12632 affects Apache Nifi. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-12632?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-12632 published?: CVE-2017-12632 was published on 2018-01-23 and last updated on 2026-06-17.

References

https://nifi.apache.org/security.html#CVE-2017-12632

Affected products (1)

cpe:2.3:a:apache:nifi:*:*:*:*:*:*:*:*

More vulnerabilities in Apache Nifi

CVE-2026-68979 — Critical (CVSS 9.8): Apache NiFI 1.10.0 through 2.10.0 provide a Parameter Context update REST API method that does not enforce…
CVE-2018-1309 — Critical (CVSS 9.8): Apache NiFi External XML Entity issue in SplitXML processor. Malicious XML content could cause information disclosure…
CVE-2017-15697 — Critical (CVSS 9.8): A malicious X-ProxyContextPath or X-Forwarded-Context header containing external resources or embedded code could cause…
CVE-2017-5636 — Critical (CVSS 9.8): In Apache NiFi before 0.7.2 and 1.x before 1.1.2 in a cluster environment, the proxy chain…
CVE-2026-68980 — Critical (CVSS 9.1): Apache NiFi 2.0.0 through 2.10.0 support creating, reading, and deleting Assets associated with Parameter Contexts…
CVE-2026-39816 — High (CVSS 8.8): The optional extension component TinkerpopClientService is missing the Restricted annotation with the Execute Code…

All CVEs affecting Apache Nifi →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48056 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download video content. Versions prior to 2.5.0…
CVE-2026-33267 — Critical (CVSS 10.0): Improper Input Validation vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.2.0…
CVE-2026-47668 — Critical (CVSS 10.0): DbGate is cross-platform database manager. In versions 7.1.8 and prior, DbGate's JSON script runner (`POST…
CVE-2026-16117 — Critical (CVSS 10.0): Impact: @fastify/http-proxy versions up to and including 11.5.0 fail to rewrite the request prefix when the prefix…
CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →