{"cve":"CVE-2020-25032","nvd":{"published":"2020-08-31T04:15:12.060","modified":"2026-06-17T03:06:15.973","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-22"],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00028.html","http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00032.html","http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00039.html","http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00048.html","https://github.com/corydolphin/flask-cors/releases/tag/3.0.9"],"products":["debian:debian_linux","flask-cors_project:flask-cors","opensuse:backports_sle","opensuse:leap"],"source":"nvd","synced_at":"2026-10-19T21:09:20.498348299+00:00"},"epss":{"cve":"CVE-2020-25032","score":0.04017,"percentile":0.90572,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-xc3p-ff3m-f46v","url":"https://osv.dev/vulnerability/GHSA-xc3p-ff3m-f46v","summary":"Flask-Cors Directory Traversal vulnerability","modified":"2026-09-10T03:49:15.088799664Z","packages":[{"ecosystem":"PyPI","name":"flask-cors","purl":"pkg:pypi/flask-cors","ranges":["<3.0.9"],"fixed":["3.0.9"]}]},{"id":"PYSEC-2020-43","url":"https://osv.dev/vulnerability/PYSEC-2020-43","summary":"","modified":"2025-10-09T07:22:50.566622Z","packages":[{"ecosystem":"PyPI","name":"flask-cors","purl":"pkg:pypi/flask-cors","ranges":["<3.0.9"],"fixed":["3.0.9"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}