### [CVE-2017-7817](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7817)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2056%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Firefox%20for%20Android%20address%20bar%20spoofing%20through%20fullscreen%20mode&color=brighgreen)

### Description

A spoofing vulnerability can occur when a page switches to fullscreen mode without user notification, allowing a fake address bar to be displayed. This allows an attacker to spoof which page is actually loaded and in use. Note: This attack only affects Firefox for Android. Other operating systems are not affected. This vulnerability affects Firefox < 56.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1356596

#### Github
No PoCs found on GitHub currently.