CVE-2025-34110 CRITICAL

CVE-2025-34110: ColoradoFTP Server <= 1.3 Build 8 Path Traversal Information Disclosure

Vendor Coloradoftp
Product Server
Weakness CWE-22 · Path traversal
Published July 15, 2025
Last update May 15, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 15, 2025 CVE published
May 15, 2026 Record updated