CVE-2021-23393

CVSS V2 Medium 5.8 CVSS V3 Medium 5.4
Description
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.
Overview
  • CVE ID
  • CVE-2021-23393
  • Assigner
  • report@snyk.io
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-06-11T00:15:09
  • Last Modified Date
  • 2021-06-22T16:53:53
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_unchained_project:flask_unchained:*:*:*:*:*:*:*:* 1 OR 0.9.0
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:P/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • PARTIAL
  • Availability Impact
  • NONE
  • Base Score
  • 5.8
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 4.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
  • Attack Vector
  • NETWORK
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • LOW
  • Availability Impact
  • NONE
  • Base Score
  • 5.4
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 2.8
  • Impact Score
  • 2.5
References
Reference URL Reference Tags
https://snyk.io/vuln/SNYK-PYTHON-FLASKUNCHAINED-1293189 Patch Third Party Advisory
https://github.com/briancappello/flask-unchained/commit/71e36b28166f9ffbe0a991f51127f0984f7e6a40 Patch Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-23393
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23393
History
Created Old Value New Value Data Type Notes
2022-05-10 07:10:25 Added to TrackCVE
2022-12-05 04:11:23 2021-06-11T00:15Z 2021-06-11T00:15:09 CVE Published Date updated
2022-12-05 04:11:23 2021-06-22T16:53:53 CVE Modified Date updated
2022-12-05 04:11:23 Analyzed Vulnerability Status updated