QID 376251

Date Published: 2022-01-20

QID 376251: Python Flask-User Plugin Open Redirect Vulnerability

When using the make_safe_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 or \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.

Affected Versions:
All versions of flask-user up till version 1.0.2.2 are vulnerable

QID detection logic(Authenticated):
This QID checks for vulnerable versions of Flask-User plugin using the 'pip list' command.

Successful exploitation of the vulnerability may allow an attacker to redirect a user to a malicious website of attacker's choosing.

CVSS V3 rated as High - 6.1 severity.

CVSS V2 rated as Medium - 5.8 severity.

Solution

Vendor has not provided a patch yet. For more info kindly refer to CVE-2021-23401

Vendor References

CVEs related to QID 376251

CVE-2021-23401 |

Software Advisories

Advisory ID	Software	Component	Link

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