### [CVE-2018-18500](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18500)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. This vulnerability affects Thunderbird < 60.5, Firefox ESR < 60.5, and Firefox < 65.

### POC

#### Reference
- https://usn.ubuntu.com/3874-1/
- https://usn.ubuntu.com/3874-1/

#### Github
- https://github.com/0xT11/CVE-POC
- https://github.com/ZihanYe/web-browser-vulnerabilities
- https://github.com/alphaSeclab/sec-daily-2019
- https://github.com/sophoslabs/CVE-2018-18500