# Download Bypass: Poison Null Byte

If you cannot download files of a certain type, try a character bypass called "Poison Null Byte". A Poison Null Byte looks like this: %00.  The Poison Null Byte will now look like this: %2500. Adding this and then a **.md** to the end will bypass the 403 error!

e.g. \<url>/ftp/package.json.bak%2500.md