# CVE-2019-25683: FileZilla 3.40.0 Denial of Service via Local Search

> Local attackers can crash the FileZilla FTP client by entering a malformed path string in the local search field, causing a denial of service.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Apr 2026
- **Updated:** 6 Apr 2026
- **Also known as:** GHSA-g5wj-4965-6q9m, UBUNTU-CVE-2019-25683

## What is CVE-2019-25683?

CVE-2019-25683 is a medium-severity denial of service vulnerability in Filezilla-Project FileZilla, published on 5 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

FileZilla 3.40.0 contains a denial of service vulnerability in the local search functionality that allows local attackers to crash the application by supplying a malformed path string. Attackers can trigger the crash by entering a crafted path containing 384 'A' characters followed by 'BBBB' and 'CCCC' sequences in the search directory field and initiating a local search operation.

Weakness: CWE-532 (Insertion of Sensitive Information into Log File)

## Which versions are affected by CVE-2019-25683?

It affects 1 product.


Products: Filezilla-Project Filezilla Client.

## How do I fix CVE-2019-25683?

No fix has been published for CVE-2019-25683 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-25683 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25683 exists.

## Other vulnerabilities in Filezilla-Project FileZilla

- [CVE-2023-53959](https://insights.sbomify.com/CVE-2023-53959/): FileZilla Client 3.63.1 DLL Hijacking via Missing TextShaping.dll (high 8.5)
- [CVE-2022-29620](https://insights.sbomify.com/CVE-2022-29620/): Information disclosure in n/a (medium 6.5)
- [CVE-2016-15003](https://insights.sbomify.com/CVE-2016-15003/): FileZilla Client Installer uninstall.exe unquoted search path (medium 6.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-25683 and fix it if it is affected.

What it is: CVE-2019-25683 is a medium-severity denial of service vulnerability in Filezilla-Project FileZilla, published on 5 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-25683 exists.

Affected product: Filezilla-Project FileZilla. 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-2019-25683/ (Markdown: https://insights.sbomify.com/CVE-2019-25683/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-25683
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-25683
- OSV: https://osv.dev/vulnerability/CVE-2019-25683

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-25683/
Summaries are generated and may contain mistakes; the official description above is the record.