I am working on Magento 1.9.2.1. I have uploaded the Patch files of SUPEE 8788 on the root of the website. I have also deleted the below listed files:
/skin/adminhtml/default/default/media/flex.swf
/skin/adminhtml/default/default/media/uploader.swf
/skin/adminhtml/default/default/media/uploaderSingle.swf
also checked for the following files that have been modified:
/js/mage/adminhtml/uploader/instance.js contain "fustyFlowFactory"
/skin/adminhtml/default/default/boxes.css contain "background:url(images/blank.gif) repeat;"
But still this patch failed in Magento Security scan.
After that i implemented 8788v2 and my site starts giving 404 ERROR. I used the below link to revert 8788 and implement 8788v2.
https://devdocs.magento.com/guides/m1x/other/ht_install-patches.html
Please guide me to implement the patch.