CVE-2022-21659: Observable Response Discrepancy in Flask-AppBuilder
Impact User enumeration in database authentication in Flask-AppBuilder < 3.4.4. Allows for a non authenticated user to enumerate existing accounts by timing the response time from the server when you are logging in.
Patches Upgrade to 3.4.4
Workarounds
References
For more information If you have any questions or comments about this advisory: Open an issue in example link to repo Email us at example email address
Other sources
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.
— MITRE
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is CVE-2022-21659?
CVE-2022-21659 is a user enumeration vulnerability in Flask-AppBuilder, allowing unauthenticated users to enumerate existing accounts.
What is the severity of CVE-2022-21659?
CVE-2022-21659 has a severity rating of 5.3 (medium).
How does CVE-2022-21659 work?
CVE-2022-21659 allows attackers to determine the existence of user accounts by timing the response time from the server.
Which versions of Flask-AppBuilder are affected by CVE-2022-21659?
Flask-AppBuilder versions up to 3.4.2 are affected by CVE-2022-21659.
How can I mitigate CVE-2022-21659?
To mitigate CVE-2022-21659, it is recommended to update Flask-AppBuilder to a version beyond 3.4.2.