CVE-2021-21241
Flask-Security-Too CSRF Token Disclosure
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.
INFO
Published Date :
Jan. 11, 2021, 9:15 p.m.
Last Modified :
Jan. 19, 2021, 3:43 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
2.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-21241.
| URL | Resource |
|---|---|
| https://github.com/Flask-Middleware/flask-security/commit/61d313150b5f620d0b800896c4f2199005e84b1f | Patch Third Party Advisory |
| https://github.com/Flask-Middleware/flask-security/commit/6d50ee9169acf813257c37b75babe9c28e83542a | Patch Third Party Advisory |
| https://github.com/Flask-Middleware/flask-security/pull/422 | Patch Third Party Advisory |
| https://github.com/Flask-Middleware/flask-security/releases/tag/3.4.5 | Third Party Advisory |
| https://github.com/Flask-Middleware/flask-security/security/advisories/GHSA-hh7m-rx4f-4vpv | Third Party Advisory |
| https://pypi.org/project/Flask-Security-Too | Product Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-21241 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-21241 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Jan. 19, 2021
Action Type Old Value New Value Changed CPE Configuration OR *cpe:2.3:a:flask-security_project:flask-security:*:*:*:*:*:*:*:* versions from (including) 3.3.0 up to (excluding) 3.4.5 OR *cpe:2.3:a:flask-security-too_project:flask-security-too:*:*:*:*:*:*:*:* versions from (including) 3.3.0 up to (excluding) 3.4.5 -
Initial Analysis by [email protected]
Jan. 15, 2021
Action Type Old Value New Value Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N Changed Reference Type https://github.com/Flask-Middleware/flask-security/commit/61d313150b5f620d0b800896c4f2199005e84b1f No Types Assigned https://github.com/Flask-Middleware/flask-security/commit/61d313150b5f620d0b800896c4f2199005e84b1f Patch, Third Party Advisory Changed Reference Type https://github.com/Flask-Middleware/flask-security/commit/6d50ee9169acf813257c37b75babe9c28e83542a No Types Assigned https://github.com/Flask-Middleware/flask-security/commit/6d50ee9169acf813257c37b75babe9c28e83542a Patch, Third Party Advisory Changed Reference Type https://github.com/Flask-Middleware/flask-security/pull/422 No Types Assigned https://github.com/Flask-Middleware/flask-security/pull/422 Patch, Third Party Advisory Changed Reference Type https://github.com/Flask-Middleware/flask-security/releases/tag/3.4.5 No Types Assigned https://github.com/Flask-Middleware/flask-security/releases/tag/3.4.5 Third Party Advisory Changed Reference Type https://github.com/Flask-Middleware/flask-security/security/advisories/GHSA-hh7m-rx4f-4vpv No Types Assigned https://github.com/Flask-Middleware/flask-security/security/advisories/GHSA-hh7m-rx4f-4vpv Third Party Advisory Changed Reference Type https://pypi.org/project/Flask-Security-Too No Types Assigned https://pypi.org/project/Flask-Security-Too Product, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:flask-security_project:flask-security:*:*:*:*:*:*:*:* versions from (including) 3.3.0 up to (excluding) 3.4.5
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-21241 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-21241
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.12 }} -0.00%
score
0.45349
percentile