CVE-2021-39183
8.2 · HIGHOverview
CVE-2021-39183 is a high-severity vulnerability affecting owncast_project owncast. It was published on December 14, 2021 and has a CVSS 3.1 base score of 8.2 (HIGH).
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from owncast_project. Update owncast to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| owncast_project | owncast | >= 0, < 0.0.9 | Affected |
Frequently Asked Questions
What is CVE-2021-39183?
CVE-2021-39183 is a high-severity vulnerability affecting owncast_project owncast. It was published on December 14, 2021 and has a CVSS 3.1 base score of 8.2 (HIGH).
How severe is CVE-2021-39183?
This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2021-39183?
Check the references section for vendor advisories and patches from owncast_project. Update owncast to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2021-39183?
CyberStrike's AI-powered security agents can automatically detect CVE-2021-39183 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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