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.
{ "nvd_published_at": "2025-03-20T10:15:34Z", "cwe_ids": [], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2025-03-21T22:10:24Z" }