{"id":"PYSEC-2021-96","details":"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.","aliases":["CVE-2021-23393","GHSA-pjc4-3w99-j7v4","SNYK-PYTHON-FLASKUNCHAINED-1293189"],"modified":"2023-11-08T04:05:07.026421Z","published":"2021-06-11T00:15:00Z","references":[{"type":"ADVISORY","url":"https://snyk.io/vuln/SNYK-PYTHON-FLASKUNCHAINED-1293189"},{"type":"FIX","url":"https://github.com/briancappello/flask-unchained/commit/71e36b28166f9ffbe0a991f51127f0984f7e6a40"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-pjc4-3w99-j7v4"}],"affected":[{"package":{"name":"flask-unchained","ecosystem":"PyPI","purl":"pkg:pypi/flask-unchained"},"ranges":[{"type":"GIT","repo":"https://github.com/briancappello/flask-unchained","events":[{"introduced":"0"},{"fixed":"71e36b28166f9ffbe0a991f51127f0984f7e6a40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.0"}]}],"versions":["0.1.2","0.1.3","0.1.4","0.1.5","0.1.6","0.2.0","0.2.1","0.2.2","0.3.0","0.3.1","0.3.2","0.4.0","0.4.1","0.4.2","0.5.0","0.5.1","0.6.0","0.6.1","0.6.2","0.6.3","0.6.4","0.6.5","0.6.6","0.7.0","0.7.1","0.7.2","0.7.3","0.7.4","0.7.5","0.7.6","0.7.7","0.7.8","0.7.9","0.8.0","0.8.1"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/flask-unchained/PYSEC-2021-96.yaml"}}],"schema_version":"1.7.3"}