Users of chat app Discord are seeing a disconcerting new button on images: “Edit image with apps.” You can animate! Restyle! Face-swap! You can apply the transforms to anyone’s image accessible to …
Have tested this myself - you need to still give permission to the app to be connected to your account if you haven't used them, but other than that, it works out of the box.
If you don't like this, your best option would probably be to move to https://revolt.chat/
discord could access it and probably had some sharing thing in their eula
Their ToS states explicitly that they do not share any data ("We do not sell or share the personal information of our users as defined in the CCPA"), which would get them in a lot of legal trouble if proven otherwise, so they wouldn't risk it.
Hence, 3rd party apps! They have their own ToS and that means their hands are "clean".