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PYSEC-2020-43

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI / flask-cors

Introduced in: 0 Fixed in: 3.0.9

Fix pip install --upgrade 'flask-cors>=3.0.9'

References

https://github.com/corydolphin/flask-cors/releases/tag/3.0.9 [WEB]
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00028.html [WEB]
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00032.html [WEB]
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00039.html [WEB]
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00048.html [WEB]
https://www.debian.org/security/2020/dsa-4775 [ADVISORY]
https://github.com/advisories/GHSA-xc3p-ff3m-f46v [ADVISORY]