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Improper Authentication


Severity High
Score 9.1/10


Flask-AppBuilder is an application development framework, built on top of Flask. When Flask-AppBuilder is set to "AUTH_TYPE AUTH_OID", it allows an attacker to forge an HTTP request, that could deceive the backend into using any requested OpenID service. This vulnerability could grant an attacker unauthorized privilege access if a custom OpenID service is deployed by the attacker and accessible by the backend. This vulnerability is only exploitable when the application is using the OpenID 2.0 authorization protocol. This issue affects the versions prior to 4.3.11rc1.

  • LOW
  • HIGH
  • NONE
  • NONE
  • HIGH
  • NONE

CWE-287 - Improper Authentication

Improper (or broken) authentication attacks are widespread, and have accounted for many of the worst data breaches in recent years. Improper authentication attacks are a class of vulnerabilities where an attacker impersonates a legitimate user by exploiting weaknesses in either session management or credential management to gain access to the user’s account. This can result in disclosure of sensitive information, and can lead to system compromise, theft, identity theft, and fraud.

Advisory Timeline

  • Published