{"id":"CVE-2020-25032","aliases":["GHSA-xc3p-ff3m-f46v","PYSEC-2020-43"],"url":"https://o3.security/vulnerability/CVE-2020-25032","summary":"Flask-Cors Directory Traversal vulnerability","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.","published":"2020-08-31T04:15:12.060Z","modified":"2026-07-08T05:54:11.521442540Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"flask-cors","fixedVersion":"3.0.9"}],"fix":null,"references":[{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00028.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00032.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00039.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00048.html"},{"type":"ADVISORY","url":"https://github.com/corydolphin/flask-cors/releases/tag/3.0.9"},{"type":"ADVISORY","url":"https://www.debian.org/security/2020/dsa-4775"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T05:54:11.521442540Z"}}