Data Breach made 136,000 COVID-19 test results publicly accessible

18. March 2021

Personal health data are considered a special category of personal data under Art. 9 of the GDPR and are therefore given special protections. A group of IT experts, including members of the German Chaos Computer Club (CCC), has now revealed security gaps in the software for test centres by which more than 136,000 COVID-19 test results of more than 80,000 data subjects have apparently been unprotected on the internet for weeks.

The IT-Security experts’ findings concern the software “SafePlay” of the Austrian company Medicus AI. Many test centres use this software to allocate appointments and to make test results digitally available to those tested. In fact, more than 100 test centres and mobile test teams in Germany and Austria are affected by the recent data breach. These include public facilities in Munich, Berlin, Mannheim as well as fixed and temporary testing stations in companies, schools and daycare centres.

In order to view the test results unlawfully, one only needed to create an account for a COVID-19 test. The URL for the test result contained the number of the test. If this number was simply counted up or down, the “test certificates” of other people became freely accessible. In addition to the test result, the test certificate also contained the name, date of birth, private address, nationality and ID number of the person concerned.

It remains unresolved whether the vulnerabilities have been exploited prior to the discovery by the CCC. The CCC notified both Medius AI and the Data Protection Authorities about the leak which led to a quick response by the company. However, IT experts and Privacy-focused NGOs commented that Medicus AI was irresponsible and grossly negligent with respect to their security measures leading to the potential disclosure of an enormous amount of sensitive personal health data.