lingthio/flask-user · Security
Open Redirect in Flask-User
- GHSA ID
- GHSA-4298-89hc-6rfv
- CVE ID
- CVE-2021-23401
- Severity
- medium
- Published
- Updated
- CVSS
- 5.4 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CVSS v3
- 5.4 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CVSS v4
- 5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Description
This affects all versions of package Flask-User. When using the make_safe_url function, it is possible to bypass URL validation and redirect a user to an arbitrary URL by providing multiple backslashes such as /////evil.com/path or \\\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.
CWEs
- CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-23401 ↗
- https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py ↗
- https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188 ↗
- https://github.com/advisories/GHSA-4298-89hc-6rfv ↗
- https://github.com/lingthio/Flask-User ↗
- https://github.com/pypa/advisory-database/tree/main/vulns/flask-user/PYSEC-2021-337.yaml ↗