CVE-2025-32962: flask-appbuilder Open Redirect — Fix

Description

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.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-601 CWE-601

Affected Products

Vendor	Product	Versions
dpgaspar	flask-appbuilder	< 4.6.2

References

Advisories & Patches

https://github.com/dpgaspar/Flask-AppBuilder/commit/32eedbbb5cb483a3e782c5f2732de4a6a650d9b6 https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-99pm-ch96-ccp2

Frequently Asked Questions

What is CVE-2025-32962? +

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. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2025-32962? +

CVE-2025-32962 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-32962? +

CVE-2025-32962 affects products from dpgaspar, specifically: flask-appbuilder. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-32962? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2025-32962