CVE-2022-21659: Dpgaspar Flask-Appbuilder

Medium severity, CVSS 5.3. EPSS: 1% chance of exploitation in the next 30 days.

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.

Affected products

• Dpgaspar Flask-Appbuilder: before 3.4.2 (fixed in 3.4.2)

Published 2022-01-31. Last modified 2026-06-17.