Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1xeHJqLWh4MjMteHA4Ms4AA3qz

Overly permissive origin policy

Currently, the middleware operates in a way that if an allowed origin is not provided, it will return an Access-Control-Allow-Origin header with the value of the origin from the request. This behavior completely disables one of the most crucial elements of browsers - the Same Origin Policy (SOP), this could cause a very serious security threat to the users of this middleware.

If such behavior is expected, for instance, when middleware is used exclusively for prototypes and not for production applications, it should be heavily emphasized in the documentation along with an indication of the risks associated with such behavior, as many users may not be aware of it.

Permalink: https://github.com/advisories/GHSA-qxrj-hx23-xp82
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1xeHJqLWh4MjMteHA4Ms4AA3qz
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: 5 months ago
Updated: 5 months ago

CVSS Score: 8.6
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

Identifiers: GHSA-qxrj-hx23-xp82, CVE-2023-49803
References:

• https://github.com/koajs/cors/security/advisories/GHSA-qxrj-hx23-xp82
• https://github.com/koajs/cors/commit/f31dac99f5355c41e7d4dd3c4a80c5f154941a11
• https://nvd.nist.gov/vuln/detail/CVE-2023-49803
• https://github.com/advisories/GHSA-qxrj-hx23-xp82

Repository: https://github.com/koajs/cors
Blast Radius: 37.7

Affected Packages