CVE-2021-41265High· 8.1▾ TwilightImproper Authentication in Flask-AppBuilder
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 44.6 · likelihood 0.3 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Jul 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
1.3%
1.3% → 1.3%
Improper authentication on the REST API. Allows for a malicious actor with a carefully crafted request to successfully authenticate and gain access to existing protected REST API endpoints. Only affects non database authentication types, and new REST API endpoints.
Upgrade to Flask-AppBuilder 3.3.4
If you have any questions or comments about this advisory:
flask-appbuilder < 3.3.4Upgrade to a patched release:
flask-appbuilder 3.3.4Connected by shared product, vendor, weakness, or advisory.
CVE-2022-21659Medium· 5.3Observable Response Discrepancy in Flask-AppBuilder
CVE-2025-24023Low· 3.7Flask-AppBuilder Observable Response Discrepancy
CVE-2024-25128Critical· 9.1Flask-AppBuilder vulnerable to incorrect authentication when using auth type OpenID
CVE-2024-45314Low· 3.6Flask-AppBuilder's login form allows browser to cache sensitive fields
CVE-2024-27083Medium· 4.3Flask-AppBuilder's OAuth login page subject to Cross Site Scripting (XSS)
CVE-2023-29005High· 7.5Flask-AppBuilder Has No Rate Limiting on Login AUTH DB