JVN#10921428: Lemon8 App fails to restrict access permissions

Lemon8 by ByteDance K.K. provides the function to access a requested URL using Custom URL Scheme/DeepLink. 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.
The developer has released the following versions:

• Lemon8 App for Android version 3.3.5
• Lemon8 App for iOS version 3.3.5

Products Affected

• Lemon8 App for Android versions prior to 3.3.5
• Lemon8 App for iOS versions prior to 3.3.5