CVE-2025-23214 Cosmos userbase checking vulnerability
Attackers can enumerate valid usernames by analyzing login error codes, exposing user existence in the database.
- 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-2025-23214?
CVE-2025-23214 is a medium-severity vulnerability in azukaar Cosmos-Server, published on 20 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Cosmos provides users the ability self-host a home server by acting as a secure gateway to your application, as well as a server manager. By monitoring the error code returned in the login, it is possible to figure out whether a user exist or not in the database. Patched in 0.17.7.
Weakness: CWE-204
Which versions are affected by CVE-2025-23214?
How do I fix CVE-2025-23214?
No fix has been published for CVE-2025-23214 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-23214 being exploited?
There is no known exploitation of CVE-2025-23214 in the wild and no public exploit code.
Sources
Also known as GHSA-5843-2p4f-57fh.