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TI-2025-23972 Aliases CVE-2025-32962GHSA-99pm-ch96-ccp2

Flask-AppBuilder open redirect vulnerability using HTTP host injection

Priority LOW 27CWE-601Published · Updated

Key facts

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

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

Summary

Flask-AppBuilder is an application development framework built on top of Flask. Versions prior to 4.6.2 would allow for a malicious unauthenticated actor to perform an open redirect by manipulating the Host header in HTTP requests. Flask-AppBuilder 4.6.2 introduced the `FAB_SAFE_REDIRECT_HOSTS` configuration variable, which allows administrators to explicitly define which domains are considered safe for redirection. As a workaround, use a reverse proxy to enforce trusted host headers.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0023 13th percentileScored 2026-11-07
Fix Fixed Flask-AppBuilder (dpgaspar): 4.6.2flask-appbuilder (PyPI): 4.6.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
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
dpgasparFlask-AppBuilderbefore 4.6.24.6.2Patch availableCNA
—flask-appbuilder (PyPI)before 4.6.24.6.2Patch availableGHSA-99pm-ch96-ccp2
  • Flask-AppBuilder Vendordpgaspar Affected before 4.6.2 Fixed in 4.6.2 Patch available CNA
  • flask-appbuilder (PyPI) Vendor— Affected before 4.6.2 Fixed in 4.6.2 Patch available GHSA-99pm-ch96-ccp2

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:dpgaspar:flask-appbuilder:*:*:*:*:*:*:*:*before 4.6.2Vulnerabledpgaspar
  • cpe:2.3:a:dpgaspar:flask-appbuilder:*:*:*:*:*:*:*:* Versions before 4.6.2 Vulnerable ·dpgaspar

Remediation

  • Fix · CNA Flask-AppBuilder (dpgaspar) Fixed in 4.6.2
  • Fix · GHSA-99pm-ch96-ccp2 flask-appbuilder (PyPI) Fixed in 4.6.2 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-32962
  2. 2026-10-03 Alias added: GHSA-99pm-ch96-ccp2

References

Patch 1

Advisory 2

Other 1

  • 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-2022-06037 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