CVE-2021-21353

EIP tracks 1 public exploit for CVE-2021-21353. PoCs published by jinsu9758.

AI-analyzed exploit summary This repository contains a functional exploit PoC for CVE-2021-21353, a remote code execution vulnerability in PugJS. The exploit leverages template injection via the 'pretty' query parameter to execute arbitrary JavaScript code on the server.

Pug is an npm package which is a high-performance template engine. In pug before version 3.0.1, if a remote attacker was able to control the `pretty` option of the pug compiler, e.g. if you spread a user provided object such as the query parameters of a request into the pug template inputs, it was possible for them to achieve remote code execution on the node.js backend. This is fixed in version 3.0.1. This advisory applies to multiple pug packages including "pug", "pug-code-gen". pug-code-gen has a backported fix at version 2.0.3. This advisory is not exploitable if there is no way for un-trusted input to be passed to pug as the `pretty` option, e.g. if you compile templates in advance before applying user input to them, you do not need to upgrade.