Legitimate web-based VSCO viewers require you to log into your own VSCO account. They only look at publicly available data. If a website asks for your VSCO username and password to view someone else's profile picture, it is likely a phishing scam. Close the tab immediately.
: Technically savvy users sometimes open a VSCO profile on a desktop browser, right-click the profile image, and select "Open image in new tab" to see the source file. The "Snapshot" Trick : Some users have discovered that by requesting an Access Snapshot vsco profile picture viewer