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CVE-2024-6844— Inconsistent CORS Matching Due to Handling of '+' in URL Path in corydolphin/flask-cors

Quick assessment

Affected
corydolphin corydolphin/flask-cors
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Flask-CORS是Cory Dolphin个人开发者的一个Flask的跨源资源共享组件。 Flask-CORS 4.0.1版本存在安全漏洞，该漏洞源于URL路径中的+字符处理不当，可能导致跨域资源共享配置不一致。

AI Predicted 6.1 Difficulty: Easy EPSS 0.31% · P22

Possible ATT&CK Techniques 1 AI

T1502
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I. Basic Information for CVE-2024-6844

Vulnerability Information
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Vulnerability Title
Inconsistent CORS Matching Due to Handling of '+' in URL Path in corydolphin/flask-cors
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5
Vulnerability Title
Flask-CORS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Flask-CORS是Cory Dolphin个人开发者的一个Flask的跨源资源共享组件。 Flask-CORS 4.0.1版本存在安全漏洞，该漏洞源于URL路径中的+字符处理不当，可能导致跨域资源共享配置不一致。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
corydolphin corydolphin/flask-cors unspecified ~ latest -

II. Public POCs for CVE-2024-6844

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III. Intelligence Information for CVE-2024-6844

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Vendor Advisories for CVE-2024-6844 (1)

Same Patch Batch · corydolphin · 2025-03-20 · 3 CVEs total

CVE-2024-6866 Case-Insensitive Path Matching in corydolphin/flask-cors
CVE-2024-6839 Improper Regex Path Matching in corydolphin/flask-cors

IV. Related Vulnerabilities

Same product: corydolphin/flask-cors
Same vendor: corydolphin
Same weakness: CWE-346

V. Comments for CVE-2024-6844

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