CVE-2024-6844 – flask-cors

Package

Manager: pip
Name: flask-cors
Vulnerable Version: >=0 <6.0.0

Severity

Level: Medium

CVSS v3.1: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00057 pctl0.17632

Details

Flask-CORS allows for inconsistent CORS matching A vulnerability in corydolphin/flask-cors version 5.0.1 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.

Metadata

Created: 2025-03-20T12:32:45Z
Modified: 2025-05-17T18:54:45Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-8vgw-p6qm-5gr7/GHSA-8vgw-p6qm-5gr7.json
CWE IDs: []
Alternative ID: GHSA-8vgw-p6qm-5gr7
Finding: F184
Auto approve: 1