Below is the instruction on how to disable mod_security for a particular domain using cPanel
1. You will need to ensure the mod_security functionality is enabled within the Feature Manager, in order to confirm the functionality would show up within cPanel's interface:
You can read the detailed steps on how to enable Mod_security in the following link:
2. Log into the domain's cPanel
3. Select: ModSecurity
4. Select the domain you are working with and click the option to "OFF"
Simply toggle the option back to "ON" when you want to re-enable mod_security back for the domain.