Home/CVE/An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../ directory traversal to
CVE

CVE-2020-25032

An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../ directory traversal to

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.

HIGH · CVSS 7.5 EPSS 0.00897
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
▤

Affected Products & Versions

4
flask-cors project flask-cors< 3.0.9
debian linuxall versions
opensuse backports sleall versions
opensuse leapall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI flask-cors HIGH fixed in 3.0.9
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD31 Aug 2020 · 04:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
⚑

Vendor Advisories

9
suse-csafopenSUSE-SU-2024:14129-1
suse-csafopenSUSE-SU-2024:11206-1
usnUSN-6019-1
suse-csafSUSE-SU-2020:3309-1
suse-csafSUSE-SU-2020:2876-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00028.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00032.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00039.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00048.htmlMailing ListThird 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
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