Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1jZzhjLWdjMmotMndmN84AAvMF

Flask-Security vulnerable to Open Redirect

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.

Permalink: https://github.com/advisories/GHSA-cg8c-gc2j-2wf7
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1jZzhjLWdjMmotMndmN84AAvMF
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 12 months ago
Updated: 8 months ago

CVSS Score: 6.1
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Identifiers: GHSA-cg8c-gc2j-2wf7, CVE-2021-23385
References:

• https://nvd.nist.gov/vuln/detail/CVE-2021-23385
• https://github.com/mattupstate/flask-security
• https://security.snyk.io/vuln/SNYK-PYTHON-FLASKSECURITY-1293234
• https://snyk.io/blog/url-confusion-vulnerabilities/
• https://github.com/advisories/GHSA-cg8c-gc2j-2wf7

Affected Packages