### [CVE-2018-12360](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12360)
![](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&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2060%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2060.1%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2061%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Use-after-free%20when%20using%20focus()&color=brighgreen)

### Description

A use-after-free vulnerability can occur when deleting an input element during a mutation event handler triggered by focusing that element. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60, Thunderbird < 52.9, Firefox ESR < 60.1, Firefox ESR < 52.9, and Firefox < 61.

### POC

#### Reference
- https://usn.ubuntu.com/3714-1/

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