JVN#70818619: "Mercari" App for Android fails to restrict custom URL schemes properly

“Mercari” App for Android by Mercari, Inc. provides the function to access a requested URL using Custom URL Scheme. The App does not restrict access to the function properly (CWE-939) which may be exploited to direct the App to access any sites.

Impact

A remote attacker may lead a user to access an arbitrary website via the vulnerable App. As a result, the user may become a victim of a phishing attack.

Solution

Update the Application
Update the application to the latest version according to the information provided by the developer.

Products Affected

• “Mercari” App for Android prior to version 5.78.0