CVE-2019-12421

Name: CVE-2019-12421
Creator: NVD / NIST
Published: 2019-11-19T22:15:11.287+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.85%

Last modified Jun 17, 2026

CVE-2019-12421 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. When using an authentication mechanism other than PKI, when the user clicks Log Out in NiFi versions 1.0.0 to 1.9.2, NiFi invalidates the authentication token on the client side but not on the server side. This permits the user's client-side token to be used for up to 12 hours after logging out to make API requests to NiFi.. EPSS estimates a 1.85% chance of exploitation in the next 30 days.

Description

When using an authentication mechanism other than PKI, when the user clicks Log Out in NiFi versions 1.0.0 to 1.9.2, NiFi invalidates the authentication token on the client side but not on the server side. This permits the user's client-side token to be used for up to 12 hours after logging out to make API requests to NiFi.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.85%

76.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-613

Affected Software

Vendor	Product	Versions
Apache	Nifi	>= 1.0.0, <= 1.9.2

References

Timeline

Published: Nov 19, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-12421?

How severe is CVE-2019-12421?

CVE-2019-12421 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.85% probability of exploitation in the next 30 days.

How do I fix CVE-2019-12421?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-12421?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST