DM package is overriding the security access

Hello Experts,

I am running into the below issue. Please advise.

I have a user who doesn't have write access to data source and when I test with Input template it works fine. But when I run a DM package which calls allocation script where data is writing to Data source. User is successfully writing data to database.

So I don't how user is able to write data to database though he doesn't have write access.

Please advise.

Thanks,

Shiva