GHSA-8vgw-p6qm-5gr7

Suggest an improvement
Source
https://github.com/advisories/GHSA-8vgw-p6qm-5gr7
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/03/GHSA-8vgw-p6qm-5gr7/GHSA-8vgw-p6qm-5gr7.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-8vgw-p6qm-5gr7
Aliases
Published
2025-03-20T12:32:45Z
Modified
2025-03-21T22:25:52.786106Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
Flask-CORS allows for inconsistent CORS matching
Details

A vulnerability in corydolphin/flask-cors version 4.0.1 allows for inconsistent CORS matching due to the handling of the '+' character in URL paths. The request.path is passed through the unquote_plus function, which converts the '+' character to a space ' '. This behavior leads to incorrect path normalization, causing potential mismatches in CORS configuration. As a result, endpoints may not be matched correctly to their CORS settings, leading to unexpected CORS policy application. This can cause unauthorized cross-origin access or block valid requests, creating security vulnerabilities and usability issues.

Database specific
{
    "nvd_published_at": "2025-03-20T10:15:34Z",
    "cwe_ids": [],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-21T22:10:24Z"
}
References

Affected packages

PyPI / flask-cors

Package

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Last affected
4.0.1

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
3.0.9
3.0.10

4.*

4.0.0a0
4.0.0
4.0.1