# CVE-2024-39688: fishaudio/Bert-VITS2 Limited File Write in webui_preprocess.py generate_config function

> Attackers can write config files to arbitrary directories and enumerate existing paths via path traversal in the web UI preprocessing function.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Jul 2024
- **Updated:** 2 Aug 2024

## What is CVE-2024-39688?

CVE-2024-39688 is a medium-severity path traversal vulnerability in FishAudio Bert-VITS2, published on 22 Jul 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Bert-VITS2 is the VITS2 Backbone with multilingual bert. User input supplied to the data_dir variable is concatenated with other folders and used to open a new file in the generate_config function, which leads to a limited file write. The issue allows for writing /config/config.json file in arbitrary directory on the server. If a given directory path doesn’t exist, the application will return an error, so this vulnerability could also be used to gain information about existing directories on the server. This affects fishaudio/Bert-VITS2 2.3 and earlier.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2024-39688?

It affects 1 product.


Products: Fish.audio Bert-Vits2.

## How do I fix CVE-2024-39688?

No fix has been published for CVE-2024-39688 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-39688 being exploited?

There is no known exploitation of CVE-2024-39688 in the wild and no public exploit code.

## Other vulnerabilities in FishAudio Bert-VITS2

- [CVE-2024-39685](https://insights.sbomify.com/CVE-2024-39685/): fishaudio/Bert-VITS2 Command Injection in webui_preprocess.py resample function (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-39688 and fix it if it is affected.

What it is: CVE-2024-39688 is a medium-severity path traversal vulnerability in FishAudio Bert-VITS2, published on 22 Jul 2024. 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-2024-39688 in the wild and no public exploit code.

Affected product: FishAudio Bert-VITS2. 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-2024-39688/ (Markdown: https://insights.sbomify.com/CVE-2024-39688/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-39688
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-39688
- OSV: https://osv.dev/vulnerability/CVE-2024-39688

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-39688/
Summaries are generated and may contain mistakes; the official description above is the record.