CVE-2021-25827
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk74th percentile - higher than 74% of all known CVEs
Summary
Emby Server < 4.7.12.0 is vulnerable to a login bypass attack by setting the X-Forwarded-For header to a local IP address.
Risk Assessment
An attacker can gain unauthorized access to the Emby Server application, potentially leading to data disclosure and further attacks.
Recommendation
Update Emby Server to version 4.7.12.0 or later.
Other vulnerabilities in Emby Server
See all- CVE-2025-64325Critical
Emby Server prior to version 4.8.1.0 and prior to Beta version 4.9.0.0-beta allows a malicious user to send an authentication request with a manipulated X-Emby-Client value, which gets added to the devices section of the admin dashboard without sanitization.
- CVE-2023-33193Critical
A vulnerability in Emby Server may allow administrative access to the system, depending on user account settings. An attacker could spoof headers, enabling passwordless login or viewing a list of user accounts that may not have a password configured.
- CVE-2021-25828Medium
Emby Server versions < 4.6.0.50 is vulnerable to Cross Site Scripting (XSS) vulnerability via a crafted GET request to /web. The vulnerability may allow an attacker to inject malicious script.
Original NVD description (English source)
Emby Server < 4.7.12.0 is vulnerable to a login bypass attack by setting the X-Forwarded-For header to a local IP-address.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS