Twitter: url that twitter mobile site can not load

ID H1:500686
Type hackerone
Reporter seifelsallamy
Modified 2019-03-19T21:44:36


Summary: A url that twitter mobile site can not load, crushes any page containing this url

Description: Invalid hex characters crushes twitter mobile site as example go to twitter won't load.

1) Sending such url on a direct message, twitter will no longer be able to load the conversation, F429765 2) Tweet such url, anyone following you won't be able to load any tweets F429766

I think Twitter on the client side trying to find a value for %xx which is not possible so it raises an error

Steps To Reproduce:

  1. Go to
  2. Send or tweet this url
  3. You and your followers won't be able to see any tweets on the mobile site


This issue works only on (not working on IOS, Android and ) however, all twitter mobile users with no twitter app should be affected