# CVE-2025-15009: liweiyi ChestnutCMS Filename upload FilenameUtils.getExtension unrestricted upload

> Remote attackers can upload malicious files via unrestricted filename handling in ChestnutCMS, potentially leading to code execution.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Dec 2025
- **Updated:** 22 Dec 2025
- **Also known as:** GHSA-j725-9864-6gc2

## What is CVE-2025-15009?

CVE-2025-15009 is a medium-severity vulnerability in liweiyi ChestnutCMS, published on 22 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A flaw has been found in liweiyi ChestnutCMS up to 1.5.8. This vulnerability affects the function FilenameUtils.getExtension of the file /dev-api/common/upload of the component Filename Handler. Executing manipulation of the argument File can lead to unrestricted upload. The attack may be launched remotely. The exploit has been published and may be used.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2025-15009?

It affects 1 product.


Products: 1000mz Chestnutcms.

## How do I fix CVE-2025-15009?

No fix has been published for CVE-2025-15009 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-15009 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15009 exists.

## Other vulnerabilities in liweiyi ChestnutCMS

- [CVE-2024-57450](https://insights.sbomify.com/CVE-2024-57450/): File upload in n/a (critical 9.8)
- [CVE-2024-56828](https://insights.sbomify.com/CVE-2024-56828/): File upload in n/a (critical 9.8)
- [CVE-2024-57451](https://insights.sbomify.com/CVE-2024-57451/): Path traversal in n/a (high 7.5)
- [CVE-2024-57452](https://insights.sbomify.com/CVE-2024-57452/): Path traversal in n/a (high 7.5)
- [CVE-2025-70073](https://insights.sbomify.com/CVE-2025-70073/): Code injection in n/a (high 7.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-15009 and fix it if it is affected.

What it is: CVE-2025-15009 is a medium-severity vulnerability in liweiyi ChestnutCMS, published on 22 Dec 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15009 exists.

Affected product: liweiyi ChestnutCMS. 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-2025-15009/ (Markdown: https://insights.sbomify.com/CVE-2025-15009/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-15009
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-15009
- OSV: https://osv.dev/vulnerability/CVE-2025-15009

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-15009/
Summaries are generated and may contain mistakes; the official description above is the record.