CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NCVE-2020-25032
High (7.5). EPSS 4.0% chance of exploitation in the next 30 days. Fixed in flask-cors 3.0.9.
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.
Severity
- EPSS
- 4.0% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)
- CWE
- CWE-22
- Published
- Modified
- Record from
- the NVD, synced
Affected
- debian:debian_linux
- flask-cors_project:flask-cors
- opensuse:backports_sle
- opensuse:leap
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-xc3p-ff3m-f46v | PyPI | flask-cors | <3.0.9 | 3.0.9 |
| PYSEC-2020-43 | PyPI | flask-cors | <3.0.9 | 3.0.9 |
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