CVE-2025-34110

Critical

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.

SeverityCritical

CVSS9.3

Exploit probability—

ProductServer

PublishedJul 15, 2025

First seenJul 15, 2025

Weakness typeCWE-22Path traversal CWE-552CWE-552 CWE-306Missing authentication for critical function

How to fix

Patches

bitbucket.org/nolife/coloradoftp/commits/16a60c4a74ef477cd8c16ca82442eaab2fbe8c86

Affected products

Product	Affected versions	Fixed in
ColoradoFTP Server	v ≤ 1.3 Build 8	—

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