Withdrawn Advisory: Emby Server API Vulnerability allowing to gain administrative access without precondition

### Withdrawn Advisory This advisory has been withdrawn because it incorrectly listed [MediaBrowser.Server.Core](https://www.nuget.org/packages/MediaBrowser.Server.Core) as vulnerable. CVE-2025-64113 affects Emby Server versions 4.9.1.80 and prior, and Emby Server Beta versions 4.9.2.6 and prior. ### Original Description ### Impact This vulnerability affects all Emby Server versions - beta and stable up to the specified versions. It allows an attacker to gain full administrative access to an Emby Server (for Emby Server administration, **not at the OS level**,). Other than network access, no specific preconditions need to be fulfilled for a server to be vulnerable. ### Patches #### Quick Fix A quick fix will be rolled out via an update to one of the default-included Emby Server plugins. This way is chosen because many users are updating their servers manually while plugin updates are typically configured to be applied automatically. This allows to get a patch deployed to a large amount of servers within a single day. #### Server Patches Patched versions for both, Emby Server stable and Emby Server beta are available now. **All Emby Server owners are strongly encouraged to apply those updates as soon as possible.** ### Workarounds > [!NOTE] > These workarounds are OBSOLETE now. Please update Emby Server instead! As and immediate remedy, it is possible to set restricted file system permissions on the `passwordreset.txt` file in the configuration folder of Emby Server. If it doesn't exist, users can create the file themselves or just call the ForgotPassword API once, which will create the file. On Windows, users can set DENY permissions for "Authenticated users" and on Linux, permissions can be set via `sudo chmod 444 passwordreset.txt`. This will make the API request fail, which completely eliminates the vulnerability.

Source published

8 Dec 2025 16:25:53 UTC

Source modified

26 Feb 2026 01:41:23 UTC

Observed here

23 Oct 2026 16:01:25 UTC

Source terms

GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · GitHub Advisory Database · CC-BY-4.0. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS_V4 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

Publisher rating · CRITICAL