CVE-2025-64325

Emby Server is Vulnerable to Remote Code Execution Through XSS in Admin Dashboard

State: Published
Severity: 8.4 High
Published: Nov 18, 2025
Updated: Nov 19, 2025
Reserved: Oct 30, 2025

Description

Emby Server is a personal media server. Prior to version 4.8.1.0 and prior to Beta version 4.9.0.0-beta, a malicious user can send an authentication request with a manipulated X-Emby-Client value, which gets added to the devices section of the admin dashboard without sanitization. This issue has been patched in version 4.8.1.0 and Beta version 4.9.0.0-beta.

Scores

CVSS	Score	Vector	Source
4.0	8.4 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116 Improper Encoding or Escaping of Output

Affected Products

Product	Versions
Emby.SecurityEmbySupport	Emby Server (Web App) < 4.8.1.0Affected Emby Server Beta (Web App) < 4.9.0.0-betaAffected

References

https://github.com/EmbySupport/Emby.Security/security/advisories/GHSA-2gwc-988r-2r7x

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