GHSA-cg8c-gc2j-2wf7: Flask-Security vulnerable to Open Redirect

Ubuntu Security Notice 6792-1 - Naom Moshe discovered that Flask-Security incorrectly validated URLs. An attacker could use this issue to redirect users to arbitrary URLs.

This affects all versions of package Flask-Security. When using the get_post_logout_redirect and get_post_login_redirect functions, 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. **Note:** Flask-Security is not maintained anymore.