Critical · published April 24, 2023
🚨 A stored cross-site scripting vulnerability in Jellyfin can allow attackers to make admin-level calls to the server — think of it as a mischievous guest getting the keys to the server room! 🔥 Imagine inviting someone to your home and giving them access to every part of it, only to find out they can quietly change the locks while you're not looking. This vulnerability lets an attacker execute arbitrary commands on your Jellyfin instance, just like that unwelcome guest could rearrange your entire house! This is absolutely devastating! An attacker could leverage this vulnerability to gain full control over your Jellyfin server, executing arbitrary commands and potentially compromising sensitive data. If combined with another vulnerability, it could even lead to remote code execution, effectively giving an attacker the keys to your media kingdom!
Imagine inviting someone to your home and giving them access to every part of it, only to find out they can quietly change the locks while you're not looking. This vulnerability lets an attacker execute arbitrary commands on your Jellyfin instance, just like that unwelcome guest could rearrange your entire house! This vulnerability in Jellyfin's web client (`device.js`) allows an attacker to perform actions with admin privileges by exploiting stored cross-site scripting. This means they can manipulate REST endpoints and execute arbitrary code in the context of the running user.
This is absolutely devastating! An attacker could leverage this vulnerability to gain full control over your Jellyfin server, executing arbitrary commands and potentially compromising sensitive data. If combined with another vulnerability, it could even lead to remote code execution, effectively giving an attacker the keys to your media kingdom! To protect yourself, immediately update your Jellyfin instance to version 10.8.10, where this vulnerability is patched. Since no workarounds are available, this patch is crucial to secure your system. Don't wait for a breach to happen! You've got this! Keep your Jellyfin safe by updating now! 🛡️