### [CVE-2017-5386](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5386)
![](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=Version&message=%3C%2045.7%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2051%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=WebExtensions%20can%20use%20data%3A%20protocol%20to%20affect%20other%20extensions&color=brighgreen)

### Description

WebExtension scripts can use the "data:" protocol to affect pages loaded by other web extensions using this protocol, leading to potential data disclosure or privilege escalation in affected extensions. This vulnerability affects Firefox ESR < 45.7 and Firefox < 51.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1319070

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