Vulnerability · Published Jul 15, 2025 · Assigned by VulnCheck
CVE-2025-34110ColoradoFTP Server <= 1.3 Build 8 Path Traversal Information Disclosure
Critical 9.3
In plain English
A critical-severity path traversal in Server from ColoradoFTP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.9% (higher than 80% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit.
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ColoradoFTP | Server | 0 – through 1.3 Build 8 |
Weakness: CWE-22, CWE-552, CWE-306 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/scanner/ftp/colorado_ftp_traversal.rb exploit
- https://www.exploit-db.com/exploits/40231 exploit
- https://bitbucket.org/nolife/coloradoftp/commits/16a60c4a74ef477cd8c16ca82442eaab2fbe8c86 patch
- https://www.vulncheck.com/advisories/colorado-ftp-server-path-traversal-information-disclosure third-party-advisory