The com.solarized.firedown (aka Solarized FireDown Browser & Downloader) application 1.0.76 for Android allows a remote attacker to execute arbitrary JavaScript code via a crafted intent. com.solarized.firedown.IntentActivity uses a WebView component to display web content and doesn't adequately sanitize the URI or any extra data passed in the intent by any installed application (with no permissions).
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.