### [CVE-2021-23971](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-23971)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2086%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=A%20website's%20Referrer-Policy%20could%20have%20been%20be%20overridden%2C%20potentially%20resulting%20in%20the%20full%20URL%20being%20sent%20as%20a%20Referrer&color=brightgreen)

### Description

When processing a redirect with a conflicting Referrer-Policy, Firefox would have adopted the redirect's Referrer-Policy. This would have potentially resulted in more information than intended by the original origin being provided to the destination of the redirect. This vulnerability affects Firefox < 86.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1678545

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