CVE-2025-32962
Flask-AppBuilder open redirect vulnerability using HTTP host injection
Description
### Impact Flask-AppBuilder 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. ### Patches 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. Examples: ``` FAB_SAFE_REDIRECT_HOSTS = ["yourdomain.com", "sub.yourdomain.com", "*.yourcompany.com"] ``` ### Workarounds Use a Reverse Proxy to Enforce Trusted Host Headers ### References _Are there any links users can visit to find out more?_
How to fix CVE-2025-32962
To remediate CVE-2025-32962, upgrade the affected package to a fixed version below.
- —upgrade to 4.6.2 or later
Is CVE-2025-32962 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 4.6.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N |