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When using Hash Variable that uses URL parameter or user-inputted value in the SQL query, ensure that these hash variable(s) are escaped in the query!

Make use of hash variable escape keywords, see Hash Variable - Escaping the Resultant Hash Variable.

Example of VULNERABLE query:

SELECT * FROM app_fd_sample_table WHERE WHERE c_value = '#requestParam.id#'

To fix this, use ?sql hash variable escape:

SELECT * FROM app_fd_sample_table WHERE c_value = '#requestParam.id?sql#'