CVE-2021-23385

CVSS V2 None CVSS V3 Medium 6.1

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.

Overview

CVE ID
CVE-2021-23385

Assigner
report@snyk.io

Vulnerability Status
Analyzed

Published Version
2022-08-02T14:15:10

Last Modified Date
2022-08-09T12:47:02

Weakness Enumerations

CWE	URL
CWE-601	http://cwe.mitre.org/data/definitions/601.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:flask-security_project:flask-security::::::::	1	OR

CVSS Version 3

Version
3.1

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

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
REQUIRED

Scope
CHANGED

Confidentiality Impact
LOW

Availability Impact
NONE

Base Score
6.1

Base Severity
MEDIUM

Exploitability Score
2.8

Impact Score
2.7

References

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

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-23385
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23385

History

Created	Old Value	New Value	Data Type	Notes
2022-08-02 15:00:05				Added to TrackCVE