CVE-2025-32962Medium· 4.3▾ SunlitFlask-AppBuilder open redirect vulnerability using HTTP host injection
▾ Sunlit zone — Low / medium · no exploitation signal
impact 23.7 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.2%
0.2% → 0.2%
Last analysed / modified upstream
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.
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"]
Use a Reverse Proxy to Enforce Trusted Host Headers
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flask-appbuilder < 4.6.2Upgrade to a patched release:
flask-appbuilder 4.6.2Connected by shared product, vendor, weakness, or advisory.
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