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Application & OT Security · Advanced

WebView Security

Secure configuration of embedded browser components in mobile apps to prevent XSS escalation and data exposure.

Definition

Risks include enabling JavaScript unnecessarily, exposing native methods via JavaScript interfaces, loading untrusted content, allowing file access and ignoring TLS errors. Mitigations: load only trusted HTTPS content, disable file and JavaScript access unless needed, restrict JavaScript bridges and validate URLs.

Example

A WebView exposes a JavaScript interface that lets any loaded page call native functions to read files.

Exam tip

An XSS in a WebView with a native bridge can become device-level compromise.

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