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.

CVSS v3 5.4 MEDIUM
CVSS v2.0 5.8 MEDIUM

5.4^/10

CVSS v3 : MEDIUM

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

5.8^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:P/A:N

Exploitability : 8.6 / Impact : 4.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References

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

Configurations

Configuration 1 (hide)

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

History

No history.

Information

Published : 2021-06-11 00:15

Updated : 2024-02-28 18:28

NVD link : CVE-2021-23393

Mitre link : CVE-2021-23393

CVE.ORG link : CVE-2021-23393

JSON object : View

Products Affected

flask_unchained_project

flask_unchained

CWE

CWE-601

URL Redirection to Untrusted Site ('Open Redirect')

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