DataEase is an open source data visualization analysis tool. The PostgreSQL data source function allows customization of JDBC connection parameters and the PG server target. However, the PgConfiguration class in backend/src/main/java/io/dataease/provider/datasource/JdbcProvider.java does not filter any parameters and directly concatenates user input. This allows an attacker to add parameters to the JDBC URL and connect to a malicious PG server, triggering the PG JDBC deserialization vulnerability. The attacker can then execute system commands and obtain server privileges through the deserialization vulnerability.