CVE-2021-39183

Unsafe inline XSS Owncast

CVSS 8.2 HIGHEPSS 0.7%CWE-79

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.2EPSS 0.7%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

14 Dec 2021Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:L

Affected products

owncast · owncast

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References

https://github.com/owncast/owncast/security/advisories/GHSA-2hfj-cxw7-g45p