What’s Vulnerable › Vulnerabilities

CVE-2023-48702: Jellyfin Possible Remote Code Execution via custom FFmpeg binary

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-12-13 · updated 2026-06-17
• Weakness: CWE-77

Description

Jellyfin is a system for managing and streaming media. Prior to version 10.8.13, the `/System/MediaEncoder/Path` endpoint executes an arbitrary file using `ProcessStartInfo` via the `ValidateVersion` function. A malicious administrator can setup a network share and supply a UNC path to `/System/MediaEncoder/Path` which points to an executable on the network share, causing Jellyfin server to run the executable in the local context. The endpoint was removed in version 10.8.13.

Affected products

• jellyfin: before 10.8.13 — fixed in 10.8.13

How to fix

Upgrade to a fixed version: jellyfin 10.8.13. Check the vendor advisory for mitigations.

References

• https://github.com/jellyfin/jellyfin/commit/83d2c69516471e2db72d9273c6a04247d0f37c86
• https://github.com/jellyfin/jellyfin/security/advisories/GHSA-rr9h-w522-cvmr
• https://securitylab.github.com/advisories/GHSL-2023-028_jellyfin/
• https://github.com/jellyfin/jellyfin/commit/83d2c69516471e2db72d9273c6a04247d0f37c86
• https://github.com/jellyfin/jellyfin/security/advisories/GHSA-rr9h-w522-cvmr
• https://securitylab.github.com/advisories/GHSL-2023-028_jellyfin/

Get alerted when CVE-2023-48702 or the next vulnerability affects your stack