CVE-2020-25032

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.

• CWE-22

• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00028.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00032.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00039.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00048.htmlMailing List, Third Party Advisory
• https://github.com/corydolphin/flask-cors/releases/tag/3.0.9Third Party Advisory
• https://www.debian.org/security/2020/dsa-4775Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00028.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00032.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00039.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00048.htmlMailing List, Third Party Advisory
• https://github.com/corydolphin/flask-cors/releases/tag/3.0.9Third Party Advisory
• https://www.debian.org/security/2020/dsa-4775Third Party Advisory

Published

Aug 31, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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