Jellyfin is a free-software media system. Versions starting with 10.8.0 and prior to 10.8.10 and prior have a directory traversal vulnerability inside the `ClientLogController`, specifically `/ClientLog/Document`. When combined with a cross-site scripting vulnerability (CVE-2023-30627), this can result in file write and arbitrary code execution. Version 10.8.10 has a patch for this issue. There are no known workarounds.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
| Link | Tags |
|---|---|
| https://github.com/jellyfin/jellyfin/security/advisories/GHSA-9p5f-5x8v-x65m | patch vendor advisory exploit |
| https://github.com/jellyfin/jellyfin-web/security/advisories/GHSA-89hp-h43h-r5pq | vendor advisory |
| https://github.com/jellyfin/jellyfin/pull/5918 | patch vendor advisory |
| https://github.com/jellyfin/jellyfin/commit/82ad2633fdfb1c37a158057c7935f83e1129eda7 | patch |
| https://github.com/jellyfin/jellyfin/blob/22d880662283980dec994cd7d35fe269613bfce3/Jellyfin.Api/Controllers/ClientLogController.cs#L44 | vendor advisory exploit |
| https://github.com/jellyfin/jellyfin/releases/tag/v10.8.10 | release notes |