Update phpmailer_arg_injection.rb

Fixed regex to match legal name tags

Author: erikbomb

modules/exploits/multi/http/phpmailer_arg_injection.rb

@@ -61,9 +61,9 @@ def initialize(info = {})
     register_advanced_options(
       [
         OptInt.new('WaitTimeout', [true, 'Seconds to wait to trigger the payload', 300])+        
-        OptString.new('NameField', [true, 'Name of the element for the Name field', 'name'], regex: /^[a-z_]([a-z0-9_-]{0,31}|[a-z0-9_-]{0,30}\$)$/),
-        OptString.new('EmailField', [true, 'Name of the element for the Email field', 'email'] regex: /^[a-z_]([a-z0-9_-]{0,31}|[a-z0-9_-]{0,30}\$)$/),
-        OptString.new('MessageField', [true, 'Name of the element for the Message field', 'message'] regex: /^[a-z_]([a-z0-9_-]{0,31}|[a-z0-9_-]{0,30}\$)$/)
+        OptString.new('NameField', [true, 'Name of the element for the Name field', 'name'], regex: /^([^\t\n\f \/>"'=]+)$/),
+        OptString.new('EmailField', [true, 'Name of the element for the Email field', 'email'] regex: /^([^\t\n\f \/>"'=]+)$/),
+        OptString.new('MessageField', [true, 'Name of the element for the Message field', 'message'] regex: /^([^\t\n\f \/>"'=]+)$/)
       ])
   end