CVE-2021-23401 – flask-user

Package

Manager: pip
Name: flask-user
Vulnerable Version: <=1.0.2.2

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

CVSS v4.0: 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

EPSS: 0.00265 pctl0.49744

Details

Open Redirect in Flask-User 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`.

Metadata

Created: 2021-08-09T20:44:32Z
Modified: 2024-09-20T17:59:20Z
Source: MANUAL
CWE IDs: ["CWE-601"]
Alternative ID: GHSA-4298-89hc-6rfv
Finding: F156
Auto approve: 1