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

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-09-09 · updated 2026-06-17
• Weakness: CWE-552

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.

Affected products

• Media Browser Emby Server: through 4.6.4.0

References

• https://securitylab.github.com/advisories/GHSL-2021-051-emby/
• https://securitylab.github.com/advisories/GHSL-2021-051-emby/

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