Why are script tags being removed from CMS editor?
Wordpress by default has a whitelist of tags and attributes and sanitises the post content on save, stripping out anything that does not appear in that whitelist. The <script> and <style> tags are not included in that list by default as it is considered a security hole.
It is possible for us to bypass, and allow admins the ability to add in <script> tags. If this is a requirement, please email email@example.com who will be able to allow admin capability.