description: An issue was discovered in DSK DSKNet 2.16.136.0 and 2.17.136.5. A PresAbs.php SQL Injection vulnerability allows unauthenticated users to taint database data and extract sensitive information via crafted HTTP requests. The type of SQL Injection is blind boolean based. (An unauthenticated attacker can discover the endpoint by abusing a Broken Access Control issue with further SQL injection attacks to gather all user's badge numbers and PIN codes.)