The article doesn’t seem to identify a problem caused by these unexpected parameters. I would think any system that accepts input like this would need to valida

The article doesn’t seem to identify a problem caused by these unexpected parameters. I would think any system that accepts input like this would need to validate the input and reject or ignore invalid input. Where is the problem? I have been known to add a parameter like &x=1 to a page that fails to load properly the first time. It can invalidate an incorrect cache and let the page reload.