CVE-2021-23393
- Source
- https://cve.org/CVERecord?id=CVE-2021-23393
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-23393.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-23393
- Aliases
-
- GHSA-pjc4-3w99-j7v4
- PYSEC-2021-96
- SNYK-PYTHON-FLASKUNCHAINED-1293189
- Published
- 2021-06-11T00:15:09Z
- Modified
- 2026-10-20T10:53:37Z
- Severity
-
- 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N CVSS Calculator
- Summary
- [none]
- 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.
- References
Affected packages
Git / github.com/briancappello/flask-unchained
Affected ranges
- Type
- GIT
- Repo
- https://github.com/briancappello/flask-unchained
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:flask_unchained_project:flask_unchained:*:*:*:*:*:*:*:*", "range": [ { "introduced": "0" }, { "fixed": "0.9.0" } ], "source": "CPE_RANGE" }, { "range": [ { "fixed": "71e36b28166f9ffbe0a991f51127f0984f7e6a40" } ], "source": "REFERENCES_COMMIT" } ] }