CVE-2021-23385

2022-08-0214:15:10

CWE-601

[email protected]

web.nvd.nist.gov

cve

2021

23385

flask-security

url bypass

vulnerability

wsgi

werkzeug

nvd

6.1 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

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

6.3 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

36.7%

JSON

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.

Affected configurations

NVD

Node

flask-security_projectflask-security

CPENameOperatorVersion
flask-security_project:flask-securityflask-security project flask-securityeq*

CPE	Name	Operator	Version
flask-security_project:flask-security	flask-security project flask-security	eq	*

CNA Affected

[
  {
    "vendor": "n/a",
    "product": "Flask-Security",
    "versions": [
      {
        "version": "0",
        "status": "affected",
        "lessThan": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]