CVE-2020-9487

Name: CVE-2020-9487
Creator: NVD / NIST
Published: 2020-10-01T20:15:14.253+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.01%

Last modified Jun 17, 2026

CVE-2020-9487 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.. EPSS estimates a 3.01% chance of exploitation in the next 30 days.

Description

In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

3.01%

85.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Apache	Nifi	>= 1.0.0, <= 1.11.4

References

https://nifi.apache.org/security#CVE-2020-9487Vendor Advisory
https://nifi.apache.org/security#CVE-2020-9487Vendor Advisory

Timeline

Published: Oct 1, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-9487?

How severe is CVE-2020-9487?

CVE-2020-9487 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.01% probability of exploitation in the next 30 days.

How do I fix CVE-2020-9487?

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-2020-9487?

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

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Source: NVD / NIST