Brief.
We have made a fix of ideal_process.php after release 3.3 beta has been issued.
Description.
There was a vulnerability that allowed site visitor to know paths to certificates and private key of the merchant for iDEAL payment gateway.
All releases including 3.3 beta are vulnerable. Version 3.3 which will be released after this post is published has this script already fixed.
Solution.
Please download updated version of the file from here
http://www.viart.com/downloads/ideal_process-3.3.zip
Then extract files into the folder 'payments' of your shop replacing existing one.
Don't forget to make a backup copy of existing file in case something will go wrong.