CodeIgniter version 3.0 is secure ?

I am reviewing the code of an application created with CodeIgniter version 3.0 (I think it's version 3.0 because I found the line "@version 1.0, 2015-10-10" in the code). In the code, I noticed that the input validation uses the xss_clean and valid_email rules. Are these two rules secure in this old version of CodeIgniter or do they need reinforcement?

CodeIgniter 3.0 is not secure.
See http://codeigniter.com/userguide3/change...t=security

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

You can get the CodeIgniter version using.

PHP Code:

echo CI_VERSION; 


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