dpgaspar Flask-AppBuilder up to 4.6.1 Configuration FAB_SAFE_REDIRECT_HOSTS redirect

Summaryinfo

A vulnerability was found in dpgaspar Flask-AppBuilder up to 4.6.1. It has been declared as problematic. The impacted element is an unknown function of the component Configuration Handler. The manipulation of the argument FAB_SAFE_REDIRECT_HOSTS results in redirect. This vulnerability is cataloged as CVE-2025-32962. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in dpgaspar Flask-AppBuilder up to 4.6.1. Affected is some unknown processing of the component Configuration Handler. The manipulation of the argument FAB_SAFE_REDIRECT_HOSTS with an unknown input leads to a redirect vulnerability. CWE is classifying the issue as CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2025-32962 since 04/14/2025. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1204.001 by the MITRE ATT&CK project.

Upgrading to version 4.6.2 eliminates this vulnerability. Applying the patch 32eedbbb5cb483a3e782c5f2732de4a6a650d9b6 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• dpgaspar

Name

• Flask-AppBuilder

Version

• 4.6.0
• 4.6.1

License

• open-source

Website

• Product: https://github.com/dpgaspar/Flask-AppBuilder/

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