running php through cron

Hi folks. I've got a quick question about security when running a php script through a cron job. I've got a cron job set up that executes every minute and looks for idle users and pending content within a cms. I know that if I wanted to execute the script with an exec() call from within another php script I would need to chmod +x it. I don't seem to need to do this with a cron job, as I use the following command in the cron job, php /home/pablo/cmsutil/CMS_monitor.php and the permissions on CMS_monitor.php are as follows: -rw-rw-r-- 1 pablo pablo 3636 Feb 21 00:48 CMS_monitor.php My question is under these permissions could someone else with an account on this server execute this file? I'm pretty sure they couldn't but my knowledge of Linux isn't yet as extensive as I would like it to be so I can't say for sure. Can someone verify or correct me on this? Cheers and TIA. Pablo