Shopify: XSS Stored via Upload avatar PNG [HTML] File in accounts.shopify.com

Hello team, I found unrestricted file upload via avatar in https://accounts.shopify.com/accounts/, and XSS Stored in PNG IDAT chunks using exiftool , exiftool command exiftool -Comment=""alertprompt'XSS BY ZEROX4'" xsscommentexifmetadatadoublequote.png Payload example : �PNG �...

CVE-2017-16796

In SWFTools 0.9.2, the pngload function in lib/png.c does not check the return value of a realloc call, which allows remote attackers to cause a denial of service invalid write and application crash or possibly have unspecified other impact via vectors involving an IDAT tag in a crafted PNG file...