Language: PHP
Label: vulnerable
CWE: CWE-77 \u2014 Improper Neutralization of Special Elements used in a Command ('Command Injection')
The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Code:
	public function accessToken(){
		$pass = Model('SystemOption')->get('systemPassword');
		$pass = substr(md5('kodbox_'.$pass),0,15);
		$token = Mcrypt::encode(Session::sign(),$pass,3600*24*30);
		return $token;
	}