I want to develop a website using the CodeIgniter framework. I'm just worried about the security of the framework. Is there an issue or event that a website is being hacked that uses CodeIgniter framework?
CodeIgniter is safe to use as it is in active development and any security issues discovered are quickly patched.
However, this doesn't mean if you use CodeIgniter that your code will automatically be safe. The CodeIgniter codebase may be safe but you can still write unsafe code with it. This is true of any framework. You still need to know how to code defensively to prevent an attacker from exploiting your system.