Are there any ways for hacking drupal 6.3x versions with sql injections? is it possible? and yeah what are the ways of avoiding it?

Comments

Currently, 6.8 has no known vulnerabilities, so if you upgrade to that version you can be fairly confident that hackers can't perform SQL injections.

Oh Thats cool

Are you really sure? okay in wut ways website becomes vulnerable to sql injections? is it the type of coding of themes or module? brief me on it pls

and if i

and if i install modules with drupal 6.8 then will those modules be vulnerable?