PYSEC-2020-43

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/flask-cors/PYSEC-2020-43.yaml
JSON Data
https://api.test.osv.dev/v1/vulns/PYSEC-2020-43
Aliases
Published
2020-08-31T04:15:00Z
Modified
2025-09-19T02:40:00.702351Z
Summary
[none]
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.

References

Affected packages

PyPI / flask-cors

Package

Name
flask-cors
View open source insights on deps.dev
Purl
pkg:pypi/flask-cors

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.0.9

Affected versions

0.*

0.0.0.dev3
0.0.0.dev4

1.*

1.0
1.1
1.1.1
1.1.2
1.1.3
1.2.0
1.2.1
1.3.0
1.3.1
1.4.0
1.5.0
1.6.0
1.6.1
1.7.0
1.7.1
1.7.2
1.7.3
1.7.4
1.8.0
1.8.1
1.9.0
1.10.0
1.10.1
1.10.2
1.10.3

2.*

2.0.0rc1
2.0.0
2.0.1
2.1.0
2.1.1
2.1.2
2.1.3

3.*

3.0.0
3.0.1
3.0.2
3.0.3
3.0.4
3.0.6
3.0.7
3.0.8

Database specific

source

"https://github.com/pypa/advisory-database/blob/main/vulns/flask-cors/PYSEC-2020-43.yaml"