{
"id": "GHSA-pjc4-3w99-j7v4",
"aliases": [
"CVE-2021-23393"
],
"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.",
"summary": "Open redirect in Flask-Unchained",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.9.0"
}
]
}
],
"package": {
"name": "Flask-Unchained",
"ecosystem": "PyPI"
}
}
],
"modified": "2024-09-20T20:01:50Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N"
},
{
"type": "CVSS_V4",
"score": "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"
}
],
"published": "2021-06-15T15:56:59Z",
"references": [
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-23393",
"type": "ADVISORY"
},
{
"url": "https://github.com/briancappello/flask-unchained/commit/2bfeedf1bc31df851cab8c66df0c432b10406aad",
"type": "WEB"
},
{
"url": "https://github.com/briancappello/flask-unchained/commit/71e36b28166f9ffbe0a991f51127f0984f7e6a40",
"type": "WEB"
},
{
"url": "https://github.com/advisories/GHSA-pjc4-3w99-j7v4",
"type": "ADVISORY"
},
{
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/flask-unchained/PYSEC-2021-96.yaml",
"type": "WEB"
},
{
"url": "https://snyk.io/vuln/SNYK-PYTHON-FLASKUNCHAINED-1293189",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-601"
],
"severity": "MODERATE",
"github_reviewed": true,
"nvd_published_at": null,
"github_reviewed_at": "2021-06-14T19:36:47Z"
}
}