An authenticated SQL injection issue was discovered in Cacti, an open source operational monitoring and fault management framework. This issue allows authenticated users to perform privilege escalation and remote code execution. The vulnerability is located in the `graphs.php` file and is related to the `ajax hosts` and `ajax hosts noany` functions. When the `site id` parameter is greater than 0, it is directly reflected in the WHERE clause of the SQL statement, creating an SQL injection vulnerability.