Cross-site Request Forgery (CSRF) Affecting flask-security-too package, versions [3.2.0, 3.4.5)
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Test your applications- Snyk ID SNYK-PYTHON-FLASKSECURITYTOO-1244523
- published 9 Apr 2021
- disclosed 8 Apr 2021
- credit Unknown
How to fix?
Upgrade Flask-Security-Too to version 3.4.5 or higher.
Overview
Affected versions of this package are vulnerable to Cross-site Request Forgery (CSRF). When a user is setting up two-factor authentication using an authenticator app, a QRcode is generated and made available via a GET request to /tf-qrcode. Since GETs do not have any CSRF protection, it is possible a malicious 3rd party could access the QRcode and therefore gain access to two-factor authentication codes. Note that the /tf-qrcode endpoint is ONLY accessible while the user is initially setting up their device. Once setup is complete, there is no vulnerability.