CVE-2021-25827
criticalEmby Server < 4.7.12.0 is vulnerable to a login bypass attack by setting the X-Forwarded-For header to a local IP-address.
Vendor / product: Emby — emby
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.
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2023-06-28 20:15
Modified: 2026-10-24 13:10
NVD status: Modified
Last synced 3 days ago
Verified against the source API 2026-10-27 07:06 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
emby / emby <4.7.12.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://emby.media/community/index.php?/topic/98191-emby-server-46-released/ cve@mitre.org
- https://github.com/EmbySupport/security/security/advisories/GHSA-fffj-6fr6-3fgf cve@mitre.org
- https://github.com/MediaBrowser/Emby/issues/3784 cve@mitre.org
- https://emby.media/community/index.php?/topic/98191-emby-server-46-released/ af854a3a-2127-422b-91ae-364da2661108
- https://github.com/EmbySupport/security/security/advisories/GHSA-fffj-6fr6-3fgf af854a3a-2127-422b-91ae-364da2661108
- https://github.com/MediaBrowser/Emby/issues/3784 af854a3a-2127-422b-91ae-364da2661108
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:06 UTC · record ↗