flask-security: This affects all versions of package Flask-Security
CVE-2021-23385 is fixed in 2 products on 1 platform, first by python3-flask-security 1.7.5-2ubuntu0.18.04.1~esm1, released August 2, 2022. It is not reported as exploited. Patch Radar priority: Routine.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| flask-security · Debian 12.15 (bookworm) | 5.0.2-1 | DEBIAN-CVE-2021-23385 | Aug 2, 2022 |
| flask-security · Debian 13.5 (trixie) | 5.0.2-1 | DEBIAN-CVE-2021-23385 | Aug 2, 2022 |
| flask-security · Debian 14 | 5.0.2-1 | DEBIAN-CVE-2021-23385 | Aug 2, 2022 |
| python3-flask-security · Ubuntu 18.04.6 LTS (bionic) | 1.7.5-2ubuntu0.18.04.1~esm1 | python3-flask-security 1.7.5-2ubuntu0.18.04.1~esm1 | Aug 2, 2022 |
| python3-flask-security · Ubuntu 20.04 LTS (focal) | 1.7.5-2ubuntu0.20.04.1 | python3-flask-security 1.7.5-2ubuntu0.20.04.1 | Aug 2, 2022 |
| python3-flask-security · Ubuntu 22.04.1 LTS (jammy) | 4.0.0-1ubuntu0.1 | python3-flask-security 4.0.0-1ubuntu0.1 | Aug 2, 2022 |
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