Software error exposes the ID numbers for 1.26 million Danish citizens

guest · Feb 10, 2020

Software error exposes the ID numbers for 1.26 million Danish citizens
Danish tax portal accidentally shares tax payer identification numbers with Google and Adobe analytics services
February 10, 2020
https://www.zdnet.com/article/softw...-id-numbers-for-1-26-million-danish-citizens/

A software error in Denmark's government tax portal has accidentally exposed the personal identification (CPR) numbers for 1.26 million Danish citizens, a fifth of the country's total population.
The error lasted for five years (between February 2, 2015, and January 24, 2020) before it was discovered, Danish media reported last week.

According to the UFST, the error occurred on TastSelv Borger, the Danish tax administration's official self-service portal where Danish citizens go to file and pay taxes online.
Government officials said the portal contained a software bug that every time a user updated account details in the portal's settings section, their CPR number would be added to the URL.

However, despite the pretty large and ominous data leak, UFST, the agency which uncovered the leak, urged citizens to calm, as the data was most likely collected by the two analytics companies only, and there was no immediate danger of fraud to those affected.
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DXC (formerly CSC), the software company who built the self-service portal, said they fixed the bug after authorities reported the issue.

Denmark is the third Scandinavian government to suffer a security incident in the last few years. In 2015, the Swedish Transport Agency (STA) allowed several sensitive databases to be uploaded to the cloud and accessed by unvetted Serbian IT professionals. In 2018, a hacker group stole healthcare data for more than half of Norway's population.
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Software error exposes the ID numbers for 1.26 million Danish citizens

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