CVE-2025-34110 ColoradoFTP Server <= 1.3 Build 8 Path Traversal Information Disclosure
Unauthenticated attackers can read or write arbitrary files outside the FTP root directory via path traversal in ColoradoFTP 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-2025-34110?
CVE-2025-34110 is a critical path traversal vulnerability in ColoradoFTP Server, published on 15 Jul 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A directory traversal vulnerability exists in ColoradoFTP Server ≤ 1.3 Build 8 for Windows, allowing unauthenticated attackers to read or write arbitrary files outside the configured FTP root directory. The flaw is due to insufficient sanitation of user-supplied file paths in the FTP GET and PUT command handlers. Exploitation is possible by submitting traversal sequences during FTP operations, enabling access to system-sensitive files. This issue affects only the Windows version of ColoradoFTP.
Which versions are affected by CVE-2025-34110?
How do I fix CVE-2025-34110?
No fix has been published for CVE-2025-34110 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-34110 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34110 exists.
Public exploit code: 1 Metasploit module.
Sources
Also known as GHSA-c892-7f8v-xwmw.