cve/2021/CVE-2021-21322.md

CVE-2021-21322

Description

fastify-http-proxy is an npm package which is a fastify plugin for proxying your http requests to another server, with hooks. 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 4.3.1.

POC

Reference

• https://www.npmjs.com/package/fastify-http-proxy

Github

• https://github.com/ARPSyndicate/cvemon