CVE-2023-49803

描述

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.

如何修補 CVE-2023-49803

要修補 CVE-2023-49803,請將受影響套件升級到下列已修補版本。

• —升級至 5.0.0 或更新版本

CVE-2023-49803 正在被利用嗎?

低 — EPSS 為 0.1%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• from 0, < 5.0.0

CVSS 分數

參考連結(4)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2023-49803
• PATCHgithub.com/koajs/cors
• WEBgithub.com/koajs/cors/commit/f31dac99f5355c41e7d4dd3c4a80c5f154941a11
• WEBgithub.com/koajs/cors/security/advisories/GHSA-qxrj-hx23-xp82