Netflix's search functionality blindly reflects...
...whatever users put in the search query parameter without proper sanitization or validation. This creates a reflected input vulnerability that scammers can exploit.
Okay, I'll bite. Especially as the ability to search on Netflix is, apparently the result of
>> they are so busy adding new unwanted features and enshittifications
(to quote elDog's comment and the general feeling expressed by others, above, that these websites are all varying shades of rubbish):
Do you *not* want to be able to search Netflix[1]?
Or not want to ever be able be able to search Netflix by sticking the search term into the URL (to try again later - "have they released that show yet?" - or send to a friend or stick into another web page - "see the list of all the shows on Netflix that deal with cucumbers, just click here")?
Assuming you do like a search function, just what form is this "proper sanitization or validation" supposed to look like? We aren't talking about SQL Injection here, just an English[2] phrase - it may even be grammatically correct! - so just what is there to be sanitised or even validated?
Is it non valid to search for the TV show "Helpline"? Or "90210"? Or any other 'phone number they may name a show after?[3] if we move away from Netflix, putting a search for a phone number into BofA is surely a good thing to ("please search and tell me if this is your bank's helpline").
Yes, plenty of websites have plenty of horrid features - and it is a total bugger when anything can be used for scamming - but once the comments here have stopped complaining that this is an example of the websites "not working"[4] - how about we look at what is actually described as happening - and whether the claims being made by Malwarebytes, that Netflix et al are the root problem, are valid.
BTW an ad blocker - IFF it can scrub away Google paid ads (or if it can stop you using any search that delivers ads mixed in with legit results) - will help, but don't miss the point that the "malicious URL" could be inserted anywhere; using ads, and using them to deliver fake help line numbers, is the scammers going for the low-hanging fruit. That is the best kind of fruit, from the scammers' pov, of course, but if they can get these phoney phone URLs into some other place...
[1] to stick to the example given in TFA for the moment
[2] you may be scammed in other languages
[3] not forgetting that the input is from an avid watcher of teen drama whose addled brain may not recall that it is named only after the area code, so put in the full number given for that character in the one episode - i.e. the user can put anything in there, you can't filter on "that is too real a phone number".
[4] it is a pre-populated search box - if you clicked the button or just typed a RETURN character after the scammer's text, the site will - do a search! And maybe return a useful page, like the actual helpline phone number.