CVE-2020-25032

HIGH

Flask-Cors < 3.0.9 - Path Traversal via Non-Canonical Pathname

Title source: llm

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.

References (6)

Core 6

Core References

Third Party Advisory x_refsource_misc

https://github.com/corydolphin/flask-cors/releases/tag/3.0.9

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00028.html

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00032.html

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00039.html

Mailing List, Third Party Advisory vendor-advisory x_refsource_suse

http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00048.html

Third Party Advisory vendor-advisory x_refsource_debian

https://www.debian.org/security/2020/dsa-4775

Scores

CVSS v3 7.5

EPSS 0.0090

EPSS Percentile 75.9%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Details

CWE

CWE-22

Status published

Products (6)

debian/debian_linux 10.0

flask-cors_project/flask-cors < 3.0.9

opensuse/backports_sle 15.0 sp1 (2 CPE variants)

opensuse/leap 15.1

opensuse/leap 15.2

pypi/Flask-Cors 0 - 3.0.9PyPI

Published Aug 31, 2020

Tracked Since Feb 18, 2026