CVE Vulnerability

CVE-2021-23393

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.

5.8 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 8.6 / Impact : 4.9

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

Scope

5.4 /10

CVSS v3.0 : MEDIUM

V3 Legend

Vector :

Exploitability : 2.8 / Impact : 2.5

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://snyk.io/vuln/SNYK-PYTHON-FLASKUNCHAINED-1293189 Patch Third Party Advisory
https://github.com/briancappello/flask-unchained/commit/71e36b28166f9ffbe0a991f51127f0984f7e6a40 Patch Third Party Advisory
Configurations

Configuration 1

cpe:2.3:a:flask_unchained_project:flask_unchained:*:*:*:*:*:*:*:*
Information

Published : 2021-06-11 12:15

Updated : 2021-06-22 04:53

NVD link : CVE-2021-23393

Mitre link : CVE-2021-23393

Products Affected
No products.
CWE
CWE-601

URL Redirection to Untrusted Site ('Open Redirect')