CVE-2025-64113
Emby Server allows attackers to gain administrative server access without preconditions
Emby Server is a user-installable home media server. Versions below 4.9.1.81 allow 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. This issue is fixed in version 4.9.1.81.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Emby Server allows attackers to gain administrative server access without preconditions
Emby Server is a user-installable home media server. Versions below 4.9.1.81 allow 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. This issue is fixed in version 4.9.1.81.
- Record
CVE-2025-64113- CVSS 4.0
- 9.3 Critical
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 - Weakness
- CWE-640
- Updated
- 2026-11-02
EUVDEUVD-2025-201718
Emby Server is a user-installable home media server. Versions below 4.9.1.81 allow 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. This issue is fixed in version 4.9.1.81.
- Record
EUVD-2025-201718- CVSS 4.0
- 9.3 Critical
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-95fv-5gfj-2r84
Withdrawn Advisory: Emby Server API Vulnerability allowing to gain administrative access without precondition
Withdrawn Advisory
This advisory has been withdrawn because it incorrectly listed MediaBrowser.Server.Core as vulnerable.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.
- Record
GHSA-95fv-5gfj-2r84- CVSS 4.0
- 9.3 Critical
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 - Weakness
- CWE-640
- Updated
- 2026-11-02
NVD
Emby Server is a user-installable home media server. Versions below 4.9.1.81 allow 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. This issue is fixed in version 4.9.1.81.
- Record
CVE-2025-64113- CVSS 4.0
- 9.3 Critical
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-640
- Updated
- 2026-11-02
OSV
Emby Server allows attackers to gain administrative server access without preconditions
Emby Server is a user-installable home media server. Versions below 4.9.1.81 allow 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. This issue is fixed in version 4.9.1.81.
- Record
CVE-2025-64113- CVSS 4.0
- 9.3 Critical
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 - Weakness
- CWE-640
- Updated
- 2026-11-02
OSVGHSA-95fv-5gfj-2r84
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 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.
- Record
GHSA-95fv-5gfj-2r84- CVSS 4.0
- 9.3 Critical
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 - Weakness
- CWE-640
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-64113 is a critical vulnerability (CVSS 9.3) in Emby, published December 8, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.59%, the 48th percentile. No source names a fixed version.