CVE-2024-6844 Information

Description

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.

Reference

https://huntr.com/bounties/731a6cd4-d05f-4fe6-8f5b-fe088d7b34e0