CVE-2021-23020

Name: CVE-2021-23020
Creator: NVD / NIST
Published: 2021-06-01T13:15:07.96+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2021-23020 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. The NAAS 3.x before 3.10.0 API keys were generated using an insecure pseudo-random string and hashing algorithm which could lead to predictable keys.. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

Description

The NAAS 3.x before 3.10.0 API keys were generated using an insecure pseudo-random string and hashing algorithm which could lead to predictable keys.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.26%

16.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
F5	Nginx Controller	>= 3.0.0, < 3.10.0

References

https://support.f5.com/csp/article/K45263486Vendor Advisory
https://support.f5.com/csp/article/K45263486Vendor Advisory

Timeline

Published: Jun 1, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23020?

The NAAS 3.x before 3.10.0 API keys were generated using an insecure pseudo-random string and hashing algorithm which could lead to predictable keys.

How severe is CVE-2021-23020?

CVE-2021-23020 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23020?

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-2021-23020?

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

Scan your code now

Source: NVD / NIST