CVE-2021-21322 – Prefix escape

https://notcve.org/view.php?id=CVE-2021-21322

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. fastify-http-proxy es un paquete npm que es un plugin fastify para enviar sus peticiones http a otro servidor, con hooks. • https://github.com/fastify/fastify-http-proxy/commit/02d9b43c770aa16bc44470edecfaeb7c17985016 https://github.com/fastify/fastify-http-proxy/security/advisories/GHSA-c4qr-gmr9-v23w https://www.npmjs.com/package/fastify-http-proxy https://access.redhat.com/security/cve/CVE-2021-21322 https://bugzilla.redhat.com/show_bug.cgi?id=1942182 • CWE-20: Improper Input Validation •