The Java API in accesuniversitat.gencat.cat 1.7.5 allows remote attackers to get personal information of all registered students via several API endpoints.
The ArtAcces (aka cat.gencat.mobi.artacces) application 1.0 for Android does not verify X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.