CVE-2022-21659

Name: CVE-2022-21659
Creator: NVD / NIST
Published: 2022-01-31T21:15:09.013+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.95%

Last modified Jun 17, 2026

CVE-2022-21659 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Flask-AppBuilder is an application development framework, built on top of the Flask web framework. In affected versions there exists a user enumeration vulnerability. EPSS estimates a 0.95% chance of exploitation in the next 30 days.

Description

Flask-AppBuilder is an application development framework, built on top of the Flask web framework. In affected versions there exists a user enumeration vulnerability. This vulnerability allows for a non authenticated user to enumerate existing accounts by timing the response time from the server when you are logging in. Users are advised to upgrade to version 3.4.4 as soon as possible. There are no known workarounds for this issue.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.95%

56.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Dpgaspar	Flask-Appbuilder	< 3.4.2

References

https://github.com/dpgaspar/Flask-AppBuilder/pull/1775Patch, Third Party Advisory
https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-wfjw-w6pv-8p7fThird Party Advisory
https://github.com/dpgaspar/Flask-AppBuilder/pull/1775Patch, Third Party Advisory
https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-wfjw-w6pv-8p7fThird Party Advisory

Timeline

Published: Jan 31, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-21659?

How severe is CVE-2022-21659?

CVE-2022-21659 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.95% probability of exploitation in the next 30 days.

How do I fix CVE-2022-21659?

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-2022-21659?

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

Scan your code now

Source: NVD / NIST