Omission of user-controlled key authorization in the IDMSistemas platform, affecting the QSige product. This vulnerability allows an attacker to extract sensitive information from the API by making a request to the parameter '/qsige.locator/quotePrevious/centers/X', where X supports values 1,2,3, etc.
https://www.incibe.es/en/incibe-cert/notices/aviso/omission-key-controlled-authorization-qsige