CVE-2021-25827

CRITICAL
INFO Priority: 0.15 BB Relevance: 80/100
Published: 2023-06-28 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: High
A: High

Description

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
emby emby < 4.7.12.0

Bug Bounty Relevance

80 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

1.50%
Raw Score 0.014970
Percentile 74.2%
Date 2026-10-29

Intelligence Sources

nvd ref →