CVE-2024-6844: Inconsistent CORS Matching Due to Handling of '+' in URL Path in corydolphin/flask-cors
First published: Thu Mar 20 2025(Updated: )
A vulnerability in corydolphin/flask-cors version 4.0.1 allows for inconsistent CORS matching due to the handling of the '+' character in URL paths. The request.path is passed through the unquote_plus function, which converts the '+' character to a space ' '. This behavior leads to incorrect path normalization, causing potential mismatches in CORS configuration. As a result, endpoints may not be matched correctly to their CORS settings, leading to unexpected CORS policy application. This can cause unauthorized cross-origin access or block valid requests, creating security vulnerabilities and usability issues.
Credit: security@huntr.dev
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Flask-CORS | ||
| pip/flask-cors | <=4.0.1 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-6844?
CVE-2024-6844 has been classified as a moderate severity vulnerability due to potential issues with CORS matching.
How do I fix CVE-2024-6844?
To fix CVE-2024-6844, upgrade to version 4.0.2 or later of flask-cors where the inconsistency in CORS matching has been addressed.
Which software versions are affected by CVE-2024-6844?
CVE-2024-6844 affects flask-cors version 4.0.1.
What kind of issues does CVE-2024-6844 create?
CVE-2024-6844 creates issues with inconsistent CORS behavior that can lead to security vulnerabilities when handling requests.
Is there a known exploit for CVE-2024-6844?
As of now, there are no publicly known exploits for CVE-2024-6844, but it poses a risk that should not be ignored.
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