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CVE-2021-32833— Unauthenticated file read in Emby Server

Quick assessment

Affected
MediaBrowser Emby.Releases
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Emby Server是个人开发者的一款功能强大的媒体服务器。该产品主要可用于视频音频和照片等多媒体整合编辑。 Emby Server 存在安全漏洞，该漏洞源于 Windows 上的 Emby 服务器中，存在一组任意文件读取漏洞。

CVSS 8.6 · High EPSS 1.27% · P70
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I. Basic Information for CVE-2021-32833

Vulnerability Information
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Vulnerability Title
Unauthenticated file read in Emby Server
Source: CVE Program / CVE List V5
Vulnerability Description
Emby Server is a personal media server with apps on many devices. In Emby Server on Windows there is a set of arbitrary file read vulnerabilities. This vulnerability is known to exist in version 4.6.4.0 and may not be patched in later versions. Known vulnerable routes are /Videos/Id/hls/PlaylistId/SegmentId.SegmentContainer, /Images/Ratings/theme/name and /Images/MediaInfo/theme/name. For more details including proof of concept code, refer to the referenced GHSL-2021-051. This issue may lead to unauthorized access to the system especially when Emby Server is configured to be accessible from the Internet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对外部实体的文件或目录可访问
Source: CVE Program / CVE List V5
Vulnerability Title
Emby Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Emby Server是个人开发者的一款功能强大的媒体服务器。该产品主要可用于视频音频和照片等多媒体整合编辑。 Emby Server 存在安全漏洞，该漏洞源于 Windows 上的 Emby 服务器中，存在一组任意文件读取漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MediaBrowser Emby.Releases <= 4.6.4.0 -

II. Public POCs for CVE-2021-32833

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III. Intelligence Information for CVE-2021-32833

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Other References for CVE-2021-32833 (1)

IV. Related Vulnerabilities

Same weakness: CWE-552

V. Comments for CVE-2021-32833

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