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I. Basic Information for CVE-2021-21321
Vulnerability Information

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Vulnerability Title
Prefix escape
Source: NVD (National Vulnerability Database)
Vulnerability Description
fastify-reply-from is an npm package which is a fastify plugin to forward the current http request to another server. In fastify-reply-from before version 4.0.2, by crafting a specific URL, it is possible to escape the prefix of the proxied backend service. If the base url of the proxied server is "/pub/", a user expect that accessing "/priv" on the target service would not be possible. In affected versions, it is possible. This is fixed in version 4.0.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
fastify-reply-from 存在输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Matteo Collina fastify-reply-from是 (Matteo Collina)开源的一个应用软件。用于将当前的http请求转发到另一台服务器。 fastify-reply-from before version 4.0.2 存在安全漏洞,该漏洞源于通过创建特定的URL,可以转义代理后端服务的前缀。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
fastifyfastify-reply-from < 4.0.2 -
II. Public POCs for CVE-2021-21321
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III. Intelligence Information for CVE-2021-21321
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IV. Related Vulnerabilities
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