CVE-2023-33193 Emby Server Proxy Header Spoofing Vulnerability
Attackers can bypass authentication and gain administrative access by spoofing proxy headers on publicly accessible Emby Servers with loose account settings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-33193?
CVE-2023-33193 is a critical authentication bypass vulnerability in EmbySupport security, published on 30 May 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Emby Server is a user-installable home media server which stores and organizes a user's media files of virtually any format and makes them available for viewing at home and abroad on a broad range of client devices. This vulnerability may allow administrative access to an Emby Server system, depending on certain user account settings. By spoofing certain headers which are intended for interoperation with reverse proxy servers, it may be possible to affect the local/non-local network determination to allow logging in without password or to view a list of user accounts which may have no password configured. Impacted are all Emby Server system which are publicly accessible and where the administrator hasn't tightened the account login configuration for administrative users. This issue has been patched in Emby Server Beta version 4.8.31 and Emby Server version 4.7.12.
Weakness: CWE-444
Which versions are affected by CVE-2023-33193?
It affects 1 product.
Products include Emby Emby.releases.
How do I fix CVE-2023-33193?
No fix has been published for CVE-2023-33193 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2023-33193 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-33193 exists.
Public exploit code: 1 Nuclei template.