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CVE-2021-21241

CVE-2021-21241 · CSRF can expose users authentication token in Flask-Security-Too

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 "0" (seconds) which should make the token unusable.

CVSS 7.4 · High · EPSS 0.9% · Fix available

Published
Updated

Stack: system · python

Affected products and versions

  • flask-security-too

    Versions
    • >= 3.3.0, < 3.4.5: Affected

    No fix published

  • flask-security Debian:12

    Affected ranges
    • ECOSYSTEM: < 4.0.0-1

    Update to 4.0.0-1

  • flask-security Debian:13

    Affected ranges
    • ECOSYSTEM: < 4.0.0-1

    Update to 4.0.0-1

  • flask-security Debian:14

    Affected ranges
    • ECOSYSTEM: < 4.0.0-1

    Update to 4.0.0-1

  • flask-security-too PyPI

    Versions
    • 3.3.0
    • 3.3.1
    • 3.3.2
    • 3.3.3
    • 3.4.0
    • 3.4.1
    • 3.4.2
    • 3.4.3
    • 3.4.4
    Affected ranges
    • ECOSYSTEM: ≥ 3.3.0, < 3.4.5

    Update to 3.4.5

  • flask-security-too PyPI

    Versions
    • 3.3.0
    • 3.3.1
    • 3.3.2
    • 3.3.3
    • 3.4.0
    • 3.4.1
    • 3.4.2
    • 3.4.3
    • 3.4.4
    Affected ranges
    • {"events": [{"introduced": "0"}, {"fixed": "61d313150b5f620d0b800896c4f2199005e84b1f"}, {"fixed": "6d50ee9169acf813257c37b75babe9c28e83542a"}], "repo": "https://github.com/Flask-Middleware/flask-security", "type": "GIT"}
    • ECOSYSTEM: ≥ 3.3.0, < 3.4.5

    Update to 3.4.5

Original sources

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