### [CVE-2018-5168](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5168)
![](https://img.shields.io/static/v1?label=Product&message=Firefox%20ESR&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Thunderbird%20ESR&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Thunderbird&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2052.8%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2060%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Lightweight%20themes%20can%20be%20installed%20without%20user%20interaction&color=brighgreen)

### Description

Sites can bypass security checks on permissions to install lightweight themes by manipulating the "baseURI" property of the theme element. This could allow a malicious site to install a theme without user interaction which could contain offensive or embarrassing images. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1449548

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