Extension talk:CSO iFrame tag
From MediaWiki.org
"CSO_iFrame is secure if the page is protected; so, only a wiki adminstrator with Sysop privileges can modify it."
Can you make it so that the CSO_iFrame tag is only executed on pages created by admins?
Putting this on a protected page provides no security when a new user can simply create a new unprotected page and use the CSO_iFrame tag.
Another option would be to only allow iframe content from trusted domains that you can specify in a config file.