CVE-2021-39183 | BDVDB-2026-165702 Detail

owncastowncast

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.

Impact#

Per CVSS v3.1: confidentiality impact low, integrity impact high, availability impact low. Attack vector: network.

Weaknesses#

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

References#

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

Exploit#

No public exploit known

History#

Version 12021-12-14Record published in the CVE List.
Version 22024-08-04Most recent update recorded in the CVE List.

Published

Published: 2021-12-14
Last modified: 2024-08-04

Vendor information

Vendor: owncast
Product: owncast

All owncast vulnerabilities

Score

8.2 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 56.0.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Cross-Site Scripting

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
< 0.0.9
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

8.2 High

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	Low
User Interaction	Required
Scope	Changed
Confidentiality	Low
Integrity	High
Availability	Low

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).