medium5.4
CVE-2021-23393
This affects the package Flask-Unchained before 0.9.0.
Impact
This affects the package Flask-Unchained before 0.9.0. When using the the _validate_redirect_url function, it is possible to bypass URL validation and redirect a user to an arbitrary URL by providing multiple back slashes such as \\\evil.com/path. This vulnerability is only exploitable if an alternative WSGI server other than Werkzeug is used, or the default behaviour of Werkzeug is modified using 'autocorrect_location_header=False.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Flask Unchained Project | Flask Unchained | before 0.9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/briancappello/flask-unchained/commit/71e36b28166f9ffbe0a991f51127f0984f7e6a40
- https://snyk.io/vuln/SNYK-PYTHON-FLASKUNCHAINED-1293189
- https://github.com/briancappello/flask-unchained/commit/71e36b28166f9ffbe0a991f51127f0984f7e6a40
- https://snyk.io/vuln/SNYK-PYTHON-FLASKUNCHAINED-1293189