CVEs-PoC/2020/CVE-2020-15680.md

### [CVE-2020-15680](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15680)
![](https://img.shields.io/static/v1?label=Product&message=Firefox&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2082%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Presence%20of%20external%20protocol%20handlers%20could%20be%20determined%20through%20image%20tags&color=brighgreen)

### Description

If a valid external protocol handler was referenced in an image tag, the resulting broken image size could be distinguished from a broken image size of a non-existent protocol handler. This allowed an attacker to successfully probe whether an external protocol handler was registered. This vulnerability affects Firefox < 82.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1658881

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