Vulnerabilities > CVE-2021-23393 - Open Redirect vulnerability in Flask Unchained Project Flask Unchained

CVSS 5.4 - MEDIUM

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

LOW

Integrity impact

LOW

Availability impact

NONE

network

low complexity

flask-unchained-project

CWE-601

NVD

Published: 2021-06-11

Updated: 2024-11-21

Summary

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.

Vulnerable Configurations

Part	Description	Count
Application	Flask_Unchained_Project Flask Unchained Project Flask Unchained - Flask Unchained Project Flask Unchained 0.1.0 Flask Unchained Project Flask Unchained 0.1.1 Flask Unchained Project Flask Unchained 0.1.2 Flask Unchained Project Flask Unchained 0.1.3 Flask Unchained Project Flask Unchained 0.1.4 Flask Unchained Project Flask Unchained 0.1.5 Flask Unchained Project Flask Unchained 0.1.6 Flask Unchained Project Flask Unchained 0.2.0 Flask Unchained Project Flask Unchained 0.2.1 Flask Unchained Project Flask Unchained 0.2.2 Flask Unchained Project Flask Unchained 0.3.1 Flask Unchained Project Flask Unchained 0.3.2 Flask Unchained Project Flask Unchained 0.4.0 Flask Unchained Project Flask Unchained 0.4.1 Flask Unchained Project Flask Unchained 0.4.2 Flask Unchained Project Flask Unchained 0.5.0 Flask Unchained Project Flask Unchained 0.5.1 Flask Unchained Project Flask Unchained 0.6.0 Flask Unchained Project Flask Unchained 0.6.1 Flask Unchained Project Flask Unchained 0.6.2 Flask Unchained Project Flask Unchained 0.6.3 Flask Unchained Project Flask Unchained 0.6.4 Flask Unchained Project Flask Unchained 0.6.5 Flask Unchained Project Flask Unchained 0.6.6 Flask Unchained Project Flask Unchained 0.7.0 Flask Unchained Project Flask Unchained 0.7.1 Flask Unchained Project Flask Unchained 0.7.2 Flask Unchained Project Flask Unchained 0.7.3 Flask Unchained Project Flask Unchained 0.7.4 Flask Unchained Project Flask Unchained 0.7.5 Flask Unchained Project Flask Unchained 0.7.6 Flask Unchained Project Flask Unchained 0.7.7 Flask Unchained Project Flask Unchained 0.7.8 Flask Unchained Project Flask Unchained 0.7.9 Flask Unchained Project Flask Unchained 0.8.0 Flask Unchained Project Flask Unchained 0.8.1	37

Common Weakness Enumeration (CWE)

CWE-601 - URL Redirection to Untrusted Site ('Open Redirect')

Common Attack Pattern Enumeration and Classification (CAPEC)

Fake the Source of Data
An adversary provides data under a falsified identity. The purpose of using the falsified identity may be to prevent traceability of the provided data or it might be an attempt by the adversary to assume the rights granted to another identity. One of the simplest forms of this attack would be the creation of an email message with a modified "From" field in order to appear that the message was sent from someone other than the actual sender. Results of the attack vary depending on the details of the attack, but common results include privilege escalation, obfuscation of other attacks, and data corruption/manipulation.

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

References