VulnerabilityModified

CVE-2024-6839

corydolphin/flask-cors version 4.0.1 contains an improper regex path matching vulnerability.

MEDIUM 5.3EPSS 0.71%

Does this matter?

Lower severity and a low EPSS score (0.71%). Track it; it rarely justifies an emergency change on its own.

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 3.1: 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS: 0.71% probability · 52th percentile
CISA KEV: Not listed
Weakness: CWE-41
Affected: flask-cors project/flask-cors
Source: security@huntr.dev

References

https://huntr.com/bounties/403eb1fc-86f4-4820-8eba-0f3dfae9f2b4Exploit, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/05/msg00049.html

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.