### [CVE-2018-5166](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5166)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2060%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=WebExtension%20host%20permission%20bypass%20through%20filterReponseData&color=brighgreen)

### Description

WebExtensions can use request redirection and a "filterReponseData" filter to bypass host permission settings to redirect network traffic and access content from a host for which they do not have explicit user permission. This vulnerability affects Firefox < 60.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1437325

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