CVE-2021-23385

 

Published at: - 02-08-2022 04:15

Last modified: - 09-08-2022 02:47

Total changes: - 2

Description

This affects all versions of package Flask-Security. When using the get_post_logout_redirect and get_post_login_redirect functions, 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. **Note:** Flask-Security is not maintained anymore.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://security.snyk.io/vuln/SNYK-PYTHON-FLASKSECURITY-1293234
• https://github.com/mattupstate/flask-security
• https://snyk.io/blog/url-confusion-vulnerabilities/

 

Keywords

NVD

 

CVE-2021-23385

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures