Auth bypass in Coloradoftp Server
CVE-2025-34110
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.
Vulnerability class: Path Traversal (Directory Traversal)
EPSS: 0.013 (67.5th percentile) — read the EPSS interpretation.
Affected products
- Coloradoftp Server — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (exploit)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2025-34110?
- CVE-2025-34110 is a vulnerability in Coloradoftp Server, classified under Path Traversal. Published 2025-07-15.
- Is CVE-2025-34110 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.