### [CVE-2019-11712](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11712)
![](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=Product&message=Thunderbird&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2060.8%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2068%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Cross-origin%20POST%20requests%20can%20be%20made%20with%20NPAPI%20plugins%20by%20following%20308%20redirects&color=brighgreen)

### Description

POST requests made by NPAPI plugins, such as Flash, that receive a status 308 redirect response can bypass CORS requirements. This can allow an attacker to perform Cross-Site Request Forgery (CSRF) attacks. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1543804
- https://bugzilla.mozilla.org/show_bug.cgi?id=1543804

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