High severity8.2NVD Advisory· Published Dec 14, 2021· Updated Jun 17, 2026

CVE-2021-39183

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected packages

Versions sourced from the GitHub Security Advisory.

Package	Affected versions	Patched versions
github.com/owncast/owncastGo	< 0.0.9	0.0.9

Affected products

Owncast Project/Owncast
cpe:2.3:a:owncast_project:owncast:*:*:*:*:*:*:*:*
Range: <0.0.9
ghsa-coords
pkg:golang/github.com/owncast/owncast
Range: < 0.0.9
Owncast/Owncastv5
Range: < 0.0.9

Patches

Vulnerability mechanics

References

github.com/owncast/owncast/security/advisories/GHSA-2hfj-cxw7-g45pnvdExploitPatchThird Party AdvisoryWEB
github.com/advisories/GHSA-2hfj-cxw7-g45pghsaADVISORY
nvd.nist.gov/vuln/detail/CVE-2021-39183ghsaADVISORY

News mentions

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cvss	0.533
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000