hacktricks/network-services-pentesting/pentesting-web/nodejs-express.md

NodeJS Express

Cookie Signature

The tool https://github.com/DigitalInterruption/cookie-monster is a utility for automating the testing and re-signing of Express.js cookie secrets.

Single cookie with a specific name

$ cookie-monster -c eyJmb28iOiJiYXIifQ== -s LVMVxSNPdU_G8S3mkjlShUD78s4 -n session

Custom wordlist

$ cookie-monster -c eyJmb28iOiJiYXIifQ== -s LVMVxSNPdU_G8S3mkjlShUD78s4 -w custom.lst

Test multiple cookies using batch mode

$ cookie-monster -b -f cookies.json

Test multiple cookies using batch mode with a custom wordlist

$ cookie-monster -b -f cookies.json -w custom.lst

Encode and sign a new cookie

if you know the secret you can sign a the cookie.

$ cookie-monster -e -f new_cookie.json -k secret