### [CVE-2019-11744](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11744)
![](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%2060.9%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2068.1%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2069%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=XSS%20by%20breaking%20out%20of%20title%20and%20textarea%20elements%20using%20innerHTML&color=brighgreen)

### Description

Some HTML elements, such as &lt;title&gt; and &lt;textarea&gt;, can contain literal angle brackets without treating them as markup. It is possible to pass a literal closing tag to .innerHTML on these elements, and subsequent content after that will be parsed as if it were outside the tag. This can lead to XSS if a site does not filter user input as strictly for these elements as it does for other elements. This vulnerability affects Firefox < 69, Thunderbird < 68.1, Thunderbird < 60.9, Firefox ESR < 60.9, and Firefox ESR < 68.1.

### POC

#### Reference
- https://www.mozilla.org/security/advisories/mfsa2019-29/
- https://www.mozilla.org/security/advisories/mfsa2019-29/

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