@anromeo
It's Here
Scroll down 2/3rd's of the page to find it under heading:
"Magento Open Source Patches - 2.x"
Donovan
@sumeet_gorjia
Basically:
For existing AuthNet Users: You'll need to apply the patch by Mar 14th (correction) Mar 28. (they've extended the deadline)
For new AuthNet installations as of yesterday, You'll need to apply the patch now.
