Cybozu KUNAI for iPhone 2.0.3 through 3.1.5 and for Android 2.1.2 through 3.0.4 does not verify SSL certificates.
The WebView class in the Cybozu KUNAI application before 2.0.6 for Android allows remote attackers to execute arbitrary JavaScript code, and obtain sensitive information, via a crafted application that places this code into a local file associated with a file: URL.