If you rely on your application layer to enforce data privacy instead of enforcing it in your storage layer its just a matter of time until you have an issue like this. It says a lot about the security of their api and development culture that they are even struggling with something like this. This should be caught in the first architecture review session.
Klarna users are being signed in to random accounts
31–40 of 517 posts
Re: Klarna users are being signed in to random accounts
#32Their German counterpart, Sofortüberweisung, didn't properly blacklist test credentials given out by banks e.g. to developers in the beginning, so people could simply use those and pay for goods and services with fake accounts. For me there are so many red flags with all these services, as they basically "steal" your credentials to log into your online banking. And while they claim that they only use the credentials…
Then again, PSD2 API roll-out has been very ???
Re: Klarna users are being signed in to random accounts
#33Lots of times when I’ve been buying things in e-shops I’ve been offered to pay using Klarna as a payment broker. But doing so has always been more confusing for me compared to “regular” payments with a credit card anywhere else, and has on overall been a negative experience for me. I really don’t understand why anyone would prefer to use them at all. What am I missing? Can anyone help me understand?
(Not claiming it's a killer feature, but it's a feature.)
Re: Klarna users are being signed in to random accounts
#34Lots of times when I’ve been buying things in e-shops I’ve been offered to pay using Klarna as a payment broker. But doing so has always been more confusing for me compared to “regular” payments with a credit card anywhere else, and has on overall been a negative experience for me. I really don’t understand why anyone would prefer to use them at all. What am I missing? Can anyone help me understand?
As to why it's popular with consumers looking at https://www.klarna.com/uk/smoooth/ , seems like they're offering months of interest free credit and also the implication is that using Klarna doesn't affect credit score.
It'd be interesting to know how their credit risk setup works.
Re: Klarna users are being signed in to random accounts
#35I'm not sure what to think about this. My first thought is "Is this really legal?".
Re: Klarna users are being signed in to random accounts
#36Re: Klarna users are being signed in to random accounts
#37MS Exchange outlook web interface sometimes showed me completely unrelated mailbox content upon login: folders, list of messages, read status, subjects, etc. Trying to open email never worked though and the whole problem goes away after page refresh.
Sometimes I see my own mails before logging in for a short while in Outlook web app. They have some issues.
Re: Klarna users are being signed in to random accounts
#38Re: Klarna users are being signed in to random accounts
#39Before pushing to production please finish this code and choose the id you want to use:
"select * from users where id = ?"
> user_id
> profile_id
> user_profile_id
> profile_user_id
> id
> rand()
Re: Klarna users are being signed in to random accounts
#40I worked in a project over 10 years ago where something very similar happened! We had built and authentication service that, among other things, was used by a SyncML service that was used back in the day of feature phones to syncs contacts etc. You can imagine that getting someone else's contacts on your phone isn't exactly ideal. This was how we came to know about the problem, from customers getting other customers…