CVE-2021-21241 Information

Description

The Python \Flask-Security-Too\ package is used for adding security features to your Flask application. It is an is a independently maintained version of Flask-Security based on the 3.0.0 version of Flask-Security. In Flask-Security-Too from version 3.3.0 and before version 3.4.5 the /login and /change endpoints can return the authenticated user’s authentication token in response to a GET request. Since GET requests aren’t protected with a CSRF token this could lead to a malicious 3rd party site acquiring the authentication token. Version 3.4.5 and version 4.0.0 are patched. As a workaround if you aren’t using authentication tokens - you can set the SECURITY_TOKEN_MAX_AGE to �\ (seconds) which should make the token unusable.

CVSS Vector

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

Reference

https://github.com/Flask-Middleware/flask-security/releases/tag/3.4.5 https://pypi.org/project/Flask-Security-Too https://github.com/Flask-Middleware/flask-security/commit/61d313150b5f620d0b800896c4f2199005e84b1f https://github.com/Flask-Middleware/flask-security/security/advisories/GHSA-hh7m-rx4f-4vpv https://github.com/Flask-Middleware/flask-security/pull/422 https://github.com/Flask-Middleware/flask-security/commit/6d50ee9169acf813257c37b75babe9c28e83542a

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

7.4