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TI-2022-06037 Aliases CVE-2022-21659GHSA-wfjw-w6pv-8p7f

Observable Response Discrepancy in Flask-AppBuilder

Priority LOW 32CWE-203Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-203.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00953 61st percentileScored 2026-11-07
Fix Fixed Flask-AppBuilder (PyPI): 3.4.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—Flask-AppBuilder (PyPI)before 3.4.43.4.4Patch availableGHSA-wfjw-w6pv-8p7f
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • Flask-AppBuilder (PyPI) Vendor— Affected before 3.4.4 Fixed in 3.4.4 Patch available GHSA-wfjw-w6pv-8p7f

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:dpgaspar:flask-appbuilder:*:*:*:*:*:*:*:*before 3.4.2Vulnerabledpgaspar
  • cpe:2.3:a:dpgaspar:flask-appbuilder:*:*:*:*:*:*:*:* Versions before 3.4.2 Vulnerable ·dpgaspar

Remediation

  • Fix · GHSA-wfjw-w6pv-8p7f Flask-AppBuilder (PyPI) Fixed in 3.4.4 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2022-21659
  2. 2026-10-03 Alias added: GHSA-wfjw-w6pv-8p7f

References

Patch 1

Advisory 2

Other 4

  • TI-2024-17946 Flask-AppBuilder's OAuth login page subject to Cross Site Scripting (XSS) CVSS 3.1MEDIUM 6.1
  • TI-2024-16581 Flask-AppBuilder incorrect authentication when using auth type OpenID CVSS 3.1CRITICAL 9.1
  • TI-2021-18097 Improper Authentication in Flask-AppBuilder CVSS 3.1HIGH 8.8
  • TI-2023-13466 No Rate Limiting on Login AUTH DB CVSS 3.1HIGH 7.5
  • TI-2021-12470 URL Redirection to Untrusted Site ('Open Redirect') in Flask-AppBuilder CVSS 3.1HIGH 7.2
  • TI-2021-10329 Observable Response Discrepancy in Flask-AppBuilder CVSS 3.1MEDIUM 5.3
See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences