Input Validation / Webview Loadurl Injection

AndroidMobile App


Webview loadurl injection is a type of Input Validation vulnerability as defined by the Common Weakness Enumeration (CWE) directory. It is an attack that allows malicious code to be injected into a web view component, which is used to display web content in mobile apps. This type of attack is more commonly seen in Android and mobile app development due to the way in which webview components are implemented. The Open Web Application Security Project (OWASP) Testing Guide also outlines this vulnerability as an information injection attack.


This type of attack can cause a wide range of security risks, as the malicious code can be used to steal sensitive data, or even modify the application's behavior to gain unauthorized access. In addition, the malicious code may be used to launch additional attacks against the user or the system. As such, the risk associated with this vulnerability is considerable and should be addressed as soon as possible.


The best way to mitigate this vulnerability is to ensure that all user input is properly validated. This includes input coming from the web view component, as well as any other user input. By validating all user input, it will ensure that any malicious code is not executed by the application. Additionally, it is important to ensure that all webview components are kept up to date in order to reduce the risk of exploitation.


An example exploit code from the CVE directory is given below:

WebView webView = new WebView(this);
String url = "";

In this example, a webview component is created and a malicious URL is loaded. This code could be used to inject malicious code into the application, which could be used to gain unauthorized access or steal sensitive data.

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