CVE-2021-39183: Owncast Project Owncast

Medium severity, CVSS 6.1. EPSS: 0.8% chance of exploitation in the next 30 days.

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.

Affected products

Published 2021-12-14. Last modified 2026-06-17.