Vulnerability Details CVE-2021-21241
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 62.8%
CVSS Severity
CVSS v3 Score 7.4
CVSS v2 Score 4.3
References
- https://github.com/Flask-Middleware/flask-security/commit/61d313150b5f620d0b800896c4f2199005e84b1f
- https://github.com/Flask-Middleware/flask-security/commit/6d50ee9169acf813257c37b75babe9c28e83542a
- https://github.com/Flask-Middleware/flask-security/pull/422
- https://github.com/Flask-Middleware/flask-security/releases/tag/3.4.5
- https://github.com/Flask-Middleware/flask-security/security/advisories/GHSA-hh7m-rx4f-4vpv
- https://pypi.org/project/Flask-Security-Too
- https://github.com/Flask-Middleware/flask-security/commit/61d313150b5f620d0b800896c4f2199005e84b1f
- https://github.com/Flask-Middleware/flask-security/commit/6d50ee9169acf813257c37b75babe9c28e83542a
- https://github.com/Flask-Middleware/flask-security/pull/422
- https://github.com/Flask-Middleware/flask-security/releases/tag/3.4.5
- https://github.com/Flask-Middleware/flask-security/security/advisories/GHSA-hh7m-rx4f-4vpv
- https://pypi.org/project/Flask-Security-Too
Products affected by CVE-2021-21241
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cpe:2.3:a:flask-security-too_project:flask-security-too:3.3.0
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cpe:2.3:a:flask-security-too_project:flask-security-too:3.3.1
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cpe:2.3:a:flask-security-too_project:flask-security-too:3.3.2
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cpe:2.3:a:flask-security-too_project:flask-security-too:3.3.3
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cpe:2.3:a:flask-security-too_project:flask-security-too:3.4.0
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cpe:2.3:a:flask-security-too_project:flask-security-too:3.4.1
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cpe:2.3:a:flask-security-too_project:flask-security-too:3.4.2
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cpe:2.3:a:flask-security-too_project:flask-security-too:3.4.3
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cpe:2.3:a:flask-security-too_project:flask-security-too:3.4.4