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TI-2024-17946 Aliases CVE-2024-27083GHSA-fqxj-46wg-9v84

Flask-AppBuilder's OAuth login page subject to Cross Site Scripting (XSS)

Priority MEDIUM 60CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
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-79.

Summary

Flask-AppBuilder is an application development framework, built on top of Flask. A Cross-Site Scripting (XSS) vulnerability has been discovered on the OAuth login page. An attacker could trick a user to follow a specially crafted URL to the OAuth login page. This URL could inject and execute malicious javascript code that would get executed on the user's browser. This issue was introduced on 4.1.4 and patched on 4.2.1.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00567 47th percentileScored 2026-11-07
Fix Fixed Flask-AppBuilder (dpgaspar): 4.2.1Flask-AppBuilder (PyPI): 4.2.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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-AppBuilder4.1.4 to before 4.2.14.2.1Patch availableCNA
—Flask-AppBuilder (PyPI)4.1.4 to before 4.2.14.2.1Patch availableGHSA-fqxj-46wg-9v84
  • Flask-AppBuilder Vendordpgaspar Affected 4.1.4 to before 4.2.1 Fixed in 4.2.1 Patch available CNA
  • Flask-AppBuilder (PyPI) Vendor— Affected 4.1.4 to before 4.2.1 Fixed in 4.2.1 Patch available GHSA-fqxj-46wg-9v84

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:dpgaspar:flask-appbuilder:*:*:*:*:*:*:*:*4.1.4 to before 4.2.1Vulnerabledpgaspar
  • cpe:2.3:a:dpgaspar:flask-appbuilder:*:*:*:*:*:*:*:* Versions 4.1.4 to before 4.2.1 Vulnerable ·dpgaspar

Remediation

  • Fix · CNA Flask-AppBuilder (dpgaspar) Fixed in 4.2.1
  • Fix · GHSA-fqxj-46wg-9v84 Flask-AppBuilder (PyPI) Fixed in 4.2.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-27083
  2. 2026-10-03 Alias added: GHSA-fqxj-46wg-9v84

References

Patch 1

Advisory 2

Other 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
  • 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