CVE-2021-39183: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

December 14, 2021 (updated January 4, 2022)

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.

References

github.com/advisories/GHSA-2hfj-cxw7-g45p
github.com/owncast/owncast/security/advisories/GHSA-2hfj-cxw7-g45p
nvd.nist.gov/vuln/detail/CVE-2021-39183

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