For example, using the commands
\writea user can embed in the document that is processed on the server and open, read, write a files.
There is also a risk insert commands that cause an infinite loop, for example
How to anticipate all the dangers? For example, there is a form of use
\@input. What other operators are dangerous? Where can I find documentation for a complete list of commands, working with files, inserting executable code into the tex document? I want to write the full black list and filter them.
(Sorry for my bad English)