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Low, CVSS 3.7amended

Flask-AppBuilder Observable Response Discrepancy

CVE-2025-24023GHSA-p8q5-cvwx-wvwp

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (flask-appbuilder 4.5.3), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
3.7 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS
  • CVE-2025-24023: 0.33% estimated exploitation activity in the next 30 days; percentile 26.44 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Impact User enumeration in database authentication in Flask-AppBuilder <= 4.5.3 and werkzeug = 3.0.0. Allows for a non authenticated user to enumerate existing usernames by timing the response time from the server when brute forcing requests to login. Patches Upgrade to flask-appbuilder=4.5.3 Workarounds Downgrade werkzeug to <3.0.0 References Are there any links users can visit to find out more?

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-p8q5-cvwx-wvwp

  2. Revision 1 · created ·

    Published from osv record GHSA-p8q5-cvwx-wvwp

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2025-24023

Advisory: Flask-AppBuilder Observable Response Discrepancy
IDs: CVE-2025-24023, GHSA-p8q5-cvwx-wvwp
Record: https://patchnext.com/advisories/cve-2025-24023 (revision 2, source checked 26 Oct 2026, 13:31 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 3.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: flask-appbuilder 4.5.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI flask-appbuilder: affected < 4.5.3; fixed in 4.5.3

## Suggested inspection (read-only)
- `python -m pip show flask-appbuilder`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on flask-appbuilder.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-p8q5-cvwx-wvwp (OSV record GHSA-p8q5-cvwx-wvwp lists affected ranges: PyPI flask-appbuilder >=0 <4.5.3 (fixed))
- Verified: https://github.com/advisories/GHSA-p8q5-cvwx-wvwp (GitHub-reviewed advisory GHSA-p8q5-cvwx-wvwp lists affected ranges: PyPI flask-appbuilder >=0 <4.5.3)

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