MEDIUM5.3

PYSEC-2025-15

Quick fix

PYSEC-2025-15 — flask-appbuilder: upgrade to the fixed version with the command below.

pip install --upgrade 'flask-appbuilder>=4.5.3'

Details

Flask-AppBuilder is an application development framework. Prior to 4.5.3, Flask-AppBuilder allows unauthenticated users to enumerate existing usernames by timing the response time from the server when brute forcing requests to login. This vulnerability is fixed in 4.5.3.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI/flask-appbuilder

Introduced in: 0Fixed in: 4.5.3

Fixpip install --upgrade 'flask-appbuilder>=4.5.3'

References

https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-p8q5-cvwx-wvwp[ADVISORY]