CVE-2021-25827 Auth bypass in n/a
Attackers can bypass authentication by spoofing the X-Forwarded-For header with a local IP address, gaining unauthorized access to the server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-25827?
CVE-2021-25827 is a critical authentication bypass vulnerability in n/a, published on 28 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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: CWE-290
Which versions are affected by CVE-2021-25827?
It affects 1 product.
Products include Emby Emby.
How do I fix CVE-2021-25827?
No fix has been published for CVE-2021-25827 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2021-25827 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-25827 exists.
Other vulnerabilities in n/a
- CVE-2020-26948 Server-side request forgery in n/a
- CVE-2025-64113 Emby Server allows attackers to gain administrative server access without preconditions
- CVE-2025-64325 Emby Server is Vulnerable to Remote Code Execution Through XSS in Admin Dashboard
- CVE-2021-25828 Cross-site scripting in n/a
- CVE-2022-36223 Cross-site scripting in n/a
Sources
Also known as GHSA-m4q9-68f2-5wc6.