Why aren't packing slip images loading after the recent security update?

[sashWTF]

Hey there,

one of my customers sells personalized products, and up until now, we always added an image to the line item when added to the cart, and displayed the image in the packing slip template.

After the recent security update, this no longer works. I read in the documentation that all URLs apart from cdn.myshopify.com are filtered. Images that are uploaded using `/cart/add`, will be served by cdn.shopify.com though.

Is there any way to fix this quickly and add cdn.shopify.com to the whitelist as well? Q4 is coming up and the only other solution i see, is a private app for generating packing slips, resulting in quite a bit of work.

Thanks!