VULNERABILITY INTELLIGENCE

CVE-2021-39183

CVSS score8.2 HIGH
EPSS probability0.77%
CISA KEVNot currently listed
Published2021-12-14
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:L

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.

Weakness classification

  • security-advisories@github.com: CWE-79

Primary references