CVE-2024-6839 — MEDIUM (5.3)

Vulnerability Description

corydolphin/flask-cors version 4.0.1 contains an improper regex path matching vulnerability. The plugin prioritizes longer regex patterns over more specific ones when matching paths, which can lead to less restrictive CORS policies being applied to sensitive endpoints. This mismatch in regex pattern priority allows unauthorized cross-origin access to sensitive data or functionality, potentially exposing confidential information and increasing the risk of unauthorized actions by malicious actors.

CVSS Score

5.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Flask-Cors Project	Flask-Cors	4.0.1

Related Weaknesses (CWE)

CWE-41

References

https://huntr.com/bounties/403eb1fc-86f4-4820-8eba-0f3dfae9f2b4ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2025/05/msg00049.html

FAQ

What is CVE-2024-6839?

CVE-2024-6839 is a vulnerability with a CVSS score of 5.3 (MEDIUM). corydolphin/flask-cors version 4.0.1 contains an improper regex path matching vulnerability. The plugin prioritizes longer regex patterns over more specific ones when matching paths, which can lead to...

How severe is CVE-2024-6839?

CVE-2024-6839 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2024-6839?

Check the references section above for vendor advisories and patch information. Affected products include: Flask-Cors Project Flask-Cors.