vulnerability
Arch Linux: Cross-site request forgery (CVE-2021-21241)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:N/C:P/I:N/A:N) | Jan 11, 2021 | Jul 11, 2025 | Nov 27, 2025 |
Severity
4
CVSS
(AV:N/AC:M/Au:N/C:P/I:N/A:N)
Published
Jan 11, 2021
Added
Jul 11, 2025
Modified
Nov 27, 2025
Description
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.
Solution
arch-linux-upgrade-latest
References
- CVE-2021-21241
- https://attackerkb.com/topics/CVE-2021-21241
- URL-https://github.com/Flask-Middleware/flask-security/commit/61d313150b5f620d0b800896c4f2199005e84b1f
- URL-https://github.com/Flask-Middleware/flask-security/commit/6d50ee9169acf813257c37b75babe9c28e83542a
- URL-https://github.com/Flask-Middleware/flask-security/pull/422
- URL-https://github.com/Flask-Middleware/flask-security/releases/tag/3.4.5
- URL-https://github.com/Flask-Middleware/flask-security/security/advisories/GHSA-hh7m-rx4f-4vpv
- URL-https://pypi.org/project/Flask-Security-Too
- URL-https://security.archlinux.org/ASA-202105-2
- CWE-352
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