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CVE-2024-6844

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

Published: Mar 20, 2025Updated: Nov 3, 2025 Sources: CVE List NVD GHSA BDUCWE-346
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.3%
Top 80.4%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-346

Affected Products

corydolphin/flask-corscorydolphin
Library
OSS Libraries / generic-library
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
PyPiСообщество свободного программного обеспечения
On-prem
Operating Systems / linux-distro
flask-corsPyPIOSS Libraries
flask-corsflask-cors project
Library
OSS Libraries / pypi
corydolphinoss-projectOSS Librariesaka corydolphin
ооо «ред софт»commercialRUOperating Systemsaka red soft
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
pypipackage-ecosystemOSS Libraries
flask-cors projectoss-projectOSS Librariesaka flask-cors

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

References

https://huntr.com/bounties/731a6cd4-d05f-4fe6-8f5b-fe088d7b34e0
huntr.com
https://huntr.com/bounties/731a6cd4-d05f-4fe6-8f5b-fe088d7b34e0
huntr.com
http://repo.red-soft.ru/redos/7.3c/x86_64/updates/
repo.red-soft.ru
and 5 more references View all →

Timeline

Published
Mar 20, 2025
Last Updated
Nov 3, 2025

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