Form Validation - Do I need to validate Hiddens?

[szym9341]

I am working on a php/mysql form and I have validation set for all of my input fields... do I need to validate the Hidden and the Submit fields? Thanks

[devinemke]

if the values of those fields pose a potential security threat to your app then...yes you do.

[mrhappiness]

Never trust incoming data => Validate everything or you may end up working with crap

[szym9341]

thanks! I don't want to work with crap.. for sure.