CVE-2021-23393

Description

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.

Risk Information

Base Score

5.4

MODERATE

Vector

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

EPSS Score

Exploitation Probability

0.2

Associated Vulnerability

Vulnerability	OS Platform
Vulnerabilities CVE-2021-23393 are fixed in Python-flask-unchained 0.9.0	Windows
Vulnerabilities CVE-2021-23393 are fixed in Python-flask-unchained for linux 0.9.0	Linux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234