Vulnerability 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 "0" (seconds) which should make the token unusable.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Flask-Security-Too Project | Flask-Security-Too | >= 3.3.0, < 3.4.5 |
Related Weaknesses (CWE)
References
- https://github.com/Flask-Middleware/flask-security/commit/61d313150b5f620d0b8008PatchThird Party Advisory
- https://github.com/Flask-Middleware/flask-security/commit/6d50ee9169acf813257c37PatchThird Party Advisory
- https://github.com/Flask-Middleware/flask-security/pull/422PatchThird Party Advisory
- https://github.com/Flask-Middleware/flask-security/releases/tag/3.4.5Third Party Advisory
- https://github.com/Flask-Middleware/flask-security/security/advisories/GHSA-hh7mThird Party Advisory
- https://pypi.org/project/Flask-Security-TooProductThird Party Advisory
- https://github.com/Flask-Middleware/flask-security/commit/61d313150b5f620d0b8008PatchThird Party Advisory
- https://github.com/Flask-Middleware/flask-security/commit/6d50ee9169acf813257c37PatchThird Party Advisory
- https://github.com/Flask-Middleware/flask-security/pull/422PatchThird Party Advisory
- https://github.com/Flask-Middleware/flask-security/releases/tag/3.4.5Third Party Advisory
- https://github.com/Flask-Middleware/flask-security/security/advisories/GHSA-hh7mThird Party Advisory
- https://pypi.org/project/Flask-Security-TooProductThird Party Advisory
FAQ
What is CVE-2021-21241?
CVE-2021-21241 is a vulnerability with a CVSS score of 7.4 (HIGH). 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 F...
How severe is CVE-2021-21241?
CVE-2021-21241 has been rated HIGH with a CVSS base score of 7.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21241?
Check the references section above for vendor advisories and patch information. Affected products include: Flask-Security-Too Project Flask-Security-Too.