An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../ directory traversal to access private resources because resource matching does not ensure that pathnames are in a canonical format.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25032
Reference (s):
- DEBIAN:DSA-4775
- URL: https://www.debian.org/security/2020/dsa-4775
- https://github.com/corydolphin/flask-cors/releases/tag/3.0.9
- SUSE:openSUSE-SU-2020:1393
- URL: http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00028.html