The SYQ com.downloader.video.fast (aka Master Video Downloader) application through 2.0 for Android allows an attacker to execute arbitrary JavaScript code via the com.downloader.video.fast.SpeedMainAct component.
The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.