What is CVE-2021-25827?

CVE-2021-25827 is a critical-severity vulnerability in Emby, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2023-06-28.

How severe is CVE-2021-25827?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2021-25827 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Emby

CVE-2021-25827

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.

EPSS: 0.015 (71.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Emby
N/a — versions n/a

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

Public proof-of-concept exploits

References

cve@mitre.org (Product)
cve@mitre.org (Exploit, Third Party Advisory, Issue Tracking)
cve@mitre.org (Not Applicable)

Frequently asked questions

What is CVE-2021-25827?: CVE-2021-25827 is a critical-severity vulnerability in Emby, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2023-06-28.
How severe is CVE-2021-25827?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2021-25827 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.