CVE-2021-29621: Observable Response Discrepancy in Flask-AppBuilder

CVE-2021-29621 · Severity: low · CVSS 3.1 · Published 2021-06-07

Flask-AppBuilder is a development framework, built on top of Flask. User enumeration in database authentication in Flask-AppBuilder <= 3.2.3. Allows for a non authenticated user to enumerate existing accounts by timing the response time from the server when you are logging in. Upgrade to version 3.3.0 or higher to resolve.

Technologies: flask-appbuilder (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2021-29621 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2021-29621 being exploited in the wild.
How severe is CVE-2021-29621?
Low severity, with a CVSS score of 3.1, published 7 June 2021.
Which products and versions are affected?
flask-appbuilder (PyPI) ECOSYSTEM:introduced=0,fixed=3.3.0, GIT:introduced=0,fixed=780bd0e8fbf2d36ada52edb769477e0a4edae580|ECOSYSTEM:introduced=0,fixed=3.3.0.
Is there a fix for CVE-2021-29621?
Yes. flask-appbuilder (PyPI): upgrade to 3.3.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2021-29621?
Check whether you run flask-appbuilder (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • flask-appbuilder (PyPI): upgrade to 3.3.0 or later
    pip install "flask-appbuilder>=3.3.0"

Affected products

  • flask-appbuilder (PyPI) ECOSYSTEM:introduced=0,fixed=3.3.0, GIT:introduced=0,fixed=780bd0e8fbf2d36ada52edb769477e0a4edae580|ECOSYSTEM:introduced=0,fixed=3.3.0

Identifiers

  • CVE-2021-29621
  • GHSA-434h-p4gx-jm89
  • PYSEC-2021-90

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.