# 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.

- **Severity:** Critical 9.3 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Jul 2025
- **Updated:** 15 May 2026
- **Also known as:** GHSA-c892-7f8v-xwmw

## 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.

Weakness: CWE-552 (Files or Directories Accessible to External Parties), CWE-306 (Missing Authentication for Critical Functionality), CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## 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.

## 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:

- ColoradoFTP Server 1.3 Build 8 Directory Traversal Information Disclosure (metasploit)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34110 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-34110 exists.

Affected product: ColoradoFTP Server. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-34110/ (Markdown: https://insights.sbomify.com/CVE-2025-34110/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34110
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34110
- OSV: https://osv.dev/vulnerability/CVE-2025-34110

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34110/
Summaries are generated and may contain mistakes; the official description above is the record.