# CVE-2025-12347: MaxSite CMS save-file-ajax.php unrestricted upload

> Remote attackers with permissions can upload arbitrary files via the editor_files plugin, 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:** 28 Oct 2025
- **Updated:** 28 Oct 2025
- **Also known as:** GHSA-q9xr-p2gm-7fm6

## What is CVE-2025-12347?

CVE-2025-12347 is a medium-severity vulnerability in MaxSite CMS, published on 28 Oct 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 MaxSite CMS up to 109. This issue affects some unknown processing of the file application/maxsite/admin/plugins/editor_files/save-file-ajax.php. Executing manipulation of the argument file_path/content can lead to unrestricted upload. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

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

## Which versions are affected by CVE-2025-12347?

It affects 1 product.


Products: Max-3000 Maxsite Cms.

## How do I fix CVE-2025-12347?

No fix has been published for CVE-2025-12347 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-12347 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-12347 exists.

## Other vulnerabilities in MaxSite CMS

- [CVE-2022-25411](https://insights.sbomify.com/CVE-2022-25411/): File upload in n/a (critical 9.8)
- [CVE-2021-27983](https://insights.sbomify.com/CVE-2021-27983/): Code injection in n/a (critical 9.8)
- [CVE-2022-25412](https://insights.sbomify.com/CVE-2022-25412/): Path traversal in n/a (high 8.1)
- [CVE-2026-3395](https://insights.sbomify.com/CVE-2026-3395/): MaxSite CMS MarkItUp Preview AJAX Endpoint preview-ajax.php eval code injection (medium 6.9)
- [CVE-2022-25410](https://insights.sbomify.com/CVE-2022-25410/): Cross-site scripting in n/a (medium 5.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-12347 and fix it if it is affected.

What it is: CVE-2025-12347 is a medium-severity vulnerability in MaxSite CMS, published on 28 Oct 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-2025-12347 exists.

Affected product: MaxSite CMS. 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-2025-12347/ (Markdown: https://insights.sbomify.com/CVE-2025-12347/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-12347
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-12347
- OSV: https://osv.dev/vulnerability/CVE-2025-12347

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-12347/
Summaries are generated and may contain mistakes; the official description above is the record.