### [CVE-2018-12403](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12403)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2063%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Mixed%20content%20warning%20is%20not%20displayed%20when%20HTTPS%20page%20loads%20a%20favicon%20over%20HTTP&color=brighgreen)

### Description

If a site is loaded over a HTTPS connection but loads a favicon resource over HTTP, the mixed content warning is not displayed to users. This vulnerability affects Firefox < 63.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1484753

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