title: Security issues of not checking data type
body: <p><a href="https://i.stack.imgur.com/4yGVR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4yGVR.png" alt="" /></a></p>
  
  <p>It doesn’t check for password type. Password may be defined as 4-digit unsigned ints and if a user attempts to change his/her password to something other than 4-digit unsigned ints, then it may cause errors, correct?</p>
  <p>If so, what kind of errors?
  just a simple error message or can this be a major security issue?
  Can someone buffer overflow attack on this?</p>