# CVE-2025-27776: Applio allows SSRF and file write in model_download.py

> Attackers can exploit SSRF and file write flaws in Applio to access internal networks and potentially achieve remote code execution.

- **Severity:** High 8.8 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 Mar 2025
- **Updated:** 20 Mar 2025

## What is CVE-2025-27776?

CVE-2025-27776 is a high-severity server-side request forgery vulnerability in IAHispano Applio, published on 19 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Applio is a voice conversion tool. Versions 3.2.7 and prior are vulnerable to server-side request forgery (SSRF) and file write in `model_download.py` (line 240 in 3.2.7). The blind SSRF allows for sending requests on behalf of Applio server and can be leveraged to probe for other vulnerabilities on the server itself or on other back-end systems on the internal network, that the Applio server can reach. The blind SSRF can also be coupled with the arbitrary file read CVE-2025-27784 to read files from hosts on the internal network, that the Applio server can reach, which would make it a full SSRF. The file write allows for writing files on the server, which can be coupled with other vulnerabilities, for example an unsafe deserialization, to achieve remote code execution on the Applio server. As of time of publication, no known patches are available.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2025-27776?

It affects 1 product.


Products: Applio Applio.

## How do I fix CVE-2025-27776?

No fix has been published for CVE-2025-27776 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-27776 being exploited?

There is no known exploitation of CVE-2025-27776 in the wild and no public exploit code.

## Other vulnerabilities in IAHispano Applio

- [CVE-2025-27778](https://insights.sbomify.com/CVE-2025-27778/): Applio allows unsafe deserialization in infer.py (high 8.9)
- [CVE-2025-27779](https://insights.sbomify.com/CVE-2025-27779/): Applio allows unsafe deserialization in model_blender.py (high 8.9)
- [CVE-2025-27780](https://insights.sbomify.com/CVE-2025-27780/): Applio allows unsafe deserialization in model_information.py (high 8.9)
- [CVE-2025-27781](https://insights.sbomify.com/CVE-2025-27781/): Applio allows unsafe deserialization in inference.py (high 8.9)
- [CVE-2025-27774](https://insights.sbomify.com/CVE-2025-27774/): Applio allows SSRF and file write in model_download.py (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-27776 and fix it if it is affected.

What it is: CVE-2025-27776 is a high-severity server-side request forgery vulnerability in IAHispano Applio, published on 19 Mar 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-2025-27776 in the wild and no public exploit code.

Affected product: IAHispano Applio. 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-2025-27776/ (Markdown: https://insights.sbomify.com/CVE-2025-27776/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-27776
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-27776
- OSV: https://osv.dev/vulnerability/CVE-2025-27776

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-27776/
Summaries are generated and may contain mistakes; the official description above is the record.