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TI-2021-12470 Aliases CVE-2021-32805GHSA-624f-cqvr-3qw4

URL Redirection to Untrusted Site ('Open Redirect') in Flask-AppBuilder

Priority LOW 33CWE-601Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-601.

Summary

Flask-AppBuilder is an application development framework, built on top of Flask. In affected versions if using Flask-AppBuilder OAuth, an attacker can share a carefully crafted URL with a trusted domain for an application built with Flask-AppBuilder, this URL can redirect a user to a malicious site. This is an open redirect vulnerability. To resolve this issue upgrade to Flask-AppBuilder 3.2.2 or above. If upgrading is infeasible users may filter HTTP traffic containing `?next={next-site}` where the `next-site` domain is different from the application you are protecting as a workaround.

Why it matters now

EPSS 0.007 53rd percentileScored 2026-11-07
Fix Fixed Flask-AppBuilder (dpgaspar): 3.3.2Flask-AppBuilder (PyPI): 3.3.2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
dpgasparFlask-AppBuilderbefore 3.3.23.3.2Patch availableCNA
—Flask-AppBuilder (PyPI)before 3.3.23.3.2Patch availableGHSA-624f-cqvr-3qw4
  • Flask-AppBuilder Vendordpgaspar Affected before 3.3.2 Fixed in 3.3.2 Patch available CNA
  • Flask-AppBuilder (PyPI) Vendor— Affected before 3.3.2 Fixed in 3.3.2 Patch available GHSA-624f-cqvr-3qw4

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:dpgaspar:flask-appbuilder:*:*:*:*:*:*:*:*before 3.3.2Vulnerabledpgaspar
  • cpe:2.3:a:dpgaspar:flask-appbuilder:*:*:*:*:*:*:*:* Versions before 3.3.2 Vulnerable ·dpgaspar

Remediation

  • Fix · CNA Flask-AppBuilder (dpgaspar) Fixed in 3.3.2
  • Fix · GHSA-624f-cqvr-3qw4 Flask-AppBuilder (PyPI) Fixed in 3.3.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-32805
  2. 2026-10-03 Alias added: GHSA-624f-cqvr-3qw4

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-2022-06037 Observable Response Discrepancy in Flask-AppBuilder CVSS 3.1MEDIUM 5.3
  • 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