Account takeover in Android app via JavaScript bridge
A misconfigured addJavascriptInterface + flawed domain validation + javascript:// trick enabled full cookie exfiltration via WebView.
Exploit chain: JSB dispatcher → file access handler → bypass via newline injection.
Payload:
Delivered via deeplink.
Executed JSB call to toBase64.
Read Cookies file from app sandbox.
Exfiltrated session data via callback.
https://tuxplorer.com/posts/account-takeover-via-jsb/