Moderate severityNVD Advisory· Published Jan 31, 2022· Updated May 5, 2025
Observable Response Discrepancy in Flask-AppBuilder
CVE-2022-21659
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
Flask-AppBuilderPyPI | < 3.4.4 | 3.4.4 |
Affected products
2- Flask-AppBuilder/Flask-AppBuilderdescription
Patches
Vulnerability mechanics
References
7- github.com/advisories/GHSA-wfjw-w6pv-8p7fghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2022-21659ghsaADVISORY
- github.com/dpgaspar/Flask-AppBuilder/commit/e2b744c258ff62ece9d5ac7172c3b4644ff4c2feghsaWEB
- github.com/dpgaspar/Flask-AppBuilder/commits/v3.4.4ghsaWEB
- github.com/dpgaspar/Flask-AppBuilder/pull/1775ghsax_refsource_MISCWEB
- github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-wfjw-w6pv-8p7fghsax_refsource_CONFIRMWEB
- github.com/pypa/advisory-database/tree/main/vulns/flask-appbuilder/PYSEC-2022-24.yamlghsaWEB
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