cve/2021/CVE-2021-39183.md

### [CVE-2021-39183](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39183)
![](https://img.shields.io/static/v1?label=Product&message=owncast&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%200.0.9%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-79%3A%20Improper%20Neutralization%20of%20Input%20During%20Web%20Page%20Generation%20('Cross-site%20Scripting')&color=brightgreen)

### Description

Owncast is an open source, self-hosted live video streaming and chat server. In affected versions inline scripts are executed when Javascript is parsed via a paste action. This issue is patched in 0.0.9 by blocking unsafe-inline Content Security Policy and specifying the script-src. The worker-src is required to be set to blob for the video player.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/ARPSyndicate/cvemon
- https://github.com/ChamalBandara/CVEs