Any SQL injection is a big risk. I think the developer took a hiatus because of all the negative posting on joomla. And frankly i don't blame him. He crated something for free and provided free support from what it looks like and still he gets people bitching at him. I checked out the code and you have to clean a couple of the vars and you will be good to go.
In the Jobline.php change the itemId var
| Code: |
$id = intval(mosGetParam( $_REQUEST ,'id', '' ));
$Itemid = intval(mosGetParam( $_REQUEST ,'Itemid', '' ));
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If you force them to ints no one can try malicious code in the urls