### [CVE-2018-5134](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5134)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2059%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=WebExtensions%20may%20use%20view-source%3A%20URLs%20to%20bypass%20content%20restrictions&color=brighgreen)

### Description

WebExtensions may use "view-source:" URLs to view local "file:" URL content, as well as content stored in "about:cache", bypassing restrictions that only allow WebExtensions to view specific content. This vulnerability affects Firefox < 59.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1429379
- https://bugzilla.mozilla.org/show_bug.cgi?id=1429379

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