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).
CWE-94 Improper Control of Generation of Code ('Code Injection')