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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.

PUBLISHED Reserved 2025-10-30 | Published 2025-11-18 | Updated 2025-11-19 | Assigner GitHub_M




HIGH: 8.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CWE-116: Improper Encoding or Escaping of Output

Product status

Emby Server (Web App) < 4.8.1.0
affected

Emby Server Beta (Web App) < 4.9.0.0-beta
affected

References

github.com/...curity/security/advisories/GHSA-2gwc-988r-2r7x exploit

github.com/...curity/security/advisories/GHSA-2gwc-988r-2r7x

cve.org (CVE-2025-64325)

nvd.nist.gov (CVE-2025-64325)

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