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CVE-2025-64325

Emby cross-site scripting (XSS)

9.0 CRITICALPublic exploitEPSS 0.42%
  1. Published18 Nov 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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

Affected products

Emby< 4.8.1.0

Remediation

Fixed in
Emby≥ 4.8.1.0

References

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Frequently asked

Is CVE-2025-64325 being actively exploited?

CVE-2025-64325 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.42%.

How severe is CVE-2025-64325?

CVE-2025-64325 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 0.42% probability of exploitation.

Which products are affected by CVE-2025-64325?

Affected products include Emby.

How do I fix CVE-2025-64325?

Upgrade affected software to a fixed version, for example Emby 4.8.1.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-64325 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.