PT-2023-12078 · Emby · Emby Server

Xitro01 · Published 2023-06-28 · Updated 2023-07-10 · CVE-2021-25827

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Emby Server versions prior to 4.7.12.0

Description The issue allows for a login bypass attack by setting the X-Forwarded-For header to a local IP address. This enables unauthorized access without proper credentials.

Recommendations For versions prior to 4.7.12.0, update to version 4.7.12.0 or later to resolve the issue. As a temporary workaround, consider restricting access to the Emby Server to minimize the risk of exploitation. Avoid using the X-Forwarded-For header in authentication processes until the issue is resolved.

Exploit

Fix

Authentication Bypass by Spoofing

Weakness Enumeration

CWE-290

Related Identifiers

CVE-2021-25827

GHSA-FFFJ-6FR6-3FGF

Affected Products

Emby Server

References · 6

• 🔥 https://github.com/MediaBrowser/Emby/issues/3784 · Exploit
• https://osv.dev/vulnerability/CVE-2021-25827 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-25827 · Security Note
• https://github.com/EmbySupport/security/security/advisories/GHSA-fffj-6fr6-3fgf · Note
• https://t.me/cibsecurity/65698 · Telegram Post
• https://emby.media/community/index.php?/topic/98191-emby-server-46-released · Note