Element leaks

Abuse HTMLElement
Category Attack
Defenses SameSite Cookies

Some HTML Elements might be used to leak a portion of data to a cross-origin page. For example, the below media resources can leak information about its size, duration, type. HTMLMediaElement leaks the media duration and the buffered times. HTMLVideoElement leaks the videoHeight and videoWidth some browsers may also have webkitVideoDecodedByteCount, webkitAudioDecodedByteCount and webkitDecodedFrameCount getVideoPlaybackQuality() leaks the totalVideoFrames. HTMLImageElement leaks the height and width but if the image is invalid they will be 0 and image. ...