# CVE-2025-5219: FreeFloat FTP Server ASCII Command buffer overflow

> Remote attackers can trigger a buffer overflow in the ASCII command handler of FreeFloat FTP Server, potentially leading to code execution or service disruption.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/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:** 27 May 2025
- **Updated:** 27 May 2025
- **Also known as:** GHSA-j2r4-h64j-ggm9

## What is CVE-2025-5219?

CVE-2025-5219 is a medium-severity memory corruption vulnerability in FreeFloat FTP Server, published on 27 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been found in FreeFloat FTP Server 1.0.0 and classified as critical. Affected by this vulnerability is an unknown functionality of the component ASCII Command Handler. The manipulation leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input), CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2025-5219?

It affects 1 product.


Products: Freefloat Ftp Server.

## How do I fix CVE-2025-5219?

No fix has been published for CVE-2025-5219 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-5219 being exploited?

There is no known exploitation of CVE-2025-5219 in the wild and no public exploit code.

## Other vulnerabilities in FreeFloat FTP Server

- [CVE-2025-5592](https://insights.sbomify.com/CVE-2025-5592/): FreeFloat FTP Server PASSIVE Command buffer overflow (medium 6.9)
- [CVE-2025-5217](https://insights.sbomify.com/CVE-2025-5217/): FreeFloat FTP Server RMDIR Command buffer overflow (medium 6.9)
- [CVE-2025-5218](https://insights.sbomify.com/CVE-2025-5218/): FreeFloat FTP Server LITERAL Command buffer overflow (medium 6.9)
- [CVE-2025-5220](https://insights.sbomify.com/CVE-2025-5220/): FreeFloat FTP Server GET Command buffer overflow (medium 6.9)
- [CVE-2025-5073](https://insights.sbomify.com/CVE-2025-5073/): FreeFloat FTP Server MKDIR Command buffer overflow (medium 6.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-5219 and fix it if it is affected.

What it is: CVE-2025-5219 is a medium-severity memory corruption vulnerability in FreeFloat FTP Server, published on 27 May 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-5219 in the wild and no public exploit code.

Affected product: FreeFloat FTP 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-2025-5219/ (Markdown: https://insights.sbomify.com/CVE-2025-5219/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-5219
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-5219
- OSV: https://osv.dev/vulnerability/CVE-2025-5219

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-5219/
Summaries are generated and may contain mistakes; the official description above is the record.