{"id":"CVE-2021-23401","aliases":["PYSEC-2021-337","SNYK-PYTHON-FLASKUSER-1293188"],"url":"https://o3.security/vulnerability/CVE-2021-23401","summary":"Open Redirect in Flask-User","details":"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`.","published":"2021-08-09T20:44:32Z","modified":"2024-09-20T18:22:30.355979Z","cvss":{"score":5.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"flask-user","fixedVersion":null}],"fix":null,"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23401"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-4298-89hc-6rfv"},{"type":"PACKAGE","url":"https://github.com/lingthio/Flask-User"},{"type":"WEB","url":"https://github.com/lingthio/Flask-User/blob/master/flask_user/user_manager__utils.py"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/flask-user/PYSEC-2021-337.yaml"},{"type":"WEB","url":"https://snyk.io/vuln/SNYK-PYTHON-FLASKUSER-1293188"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2024-09-20T18:22:30.355979Z"}}