### [CVE-2017-7753](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7753)
![](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%2052.3%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2055%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Out-of-bounds%20read%20with%20cached%20style%20data%20and%20pseudo-elements&color=brighgreen)

### Description

An out-of-bounds read occurs when applying style rules to pseudo-elements, such as ::first-line, using cached style data. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1353312

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