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Flask App Builder has an Authentication Bypass vulnerability when using non AUTH_DB methods

Moderate severity GitHub Reviewed Published Sep 11, 2025 in dpgaspar/Flask-AppBuilder • Updated Sep 11, 2025

Package

pip flask-appbuilder (pip)

Affected versions

< 4.8.1

Patched versions

4.8.1

Description

Impact

When Flask-AppBuilder is configured to use OAuth, LDAP, or other non-database authentication methods, the password reset endpoint remains registered and accessible, despite not being displayed in the user interface. This allows an enabled user to reset their password and be able to create JWT tokens even after the user is disabled on the authentication provider.

Patches

Upgrade to Flask-AppBuilder version 4.8.1 or later

Workarounds

If immediate upgrade is not possible:

  • Manually disable password reset routes in the application configuration
  • Implement additional access controls at the web server or proxy level to block access to the reset my password URL.
  • Monitor for suspicious password reset attempts from disabled accounts

References

@dpgaspar dpgaspar published to dpgaspar/Flask-AppBuilder Sep 11, 2025
Published to the GitHub Advisory Database Sep 11, 2025
Reviewed Sep 11, 2025
Last updated Sep 11, 2025

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(17th percentile)

Weaknesses

Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Learn more on MITRE.

CVE ID

CVE-2025-58065

GHSA ID

GHSA-765j-9r45-w2q2

Source code

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