# CVE-2025-34239: Advantech WebAccess/VPN < 1.1.5 Command Injection in AppManagementController.appUpgradeAction()

> An authenticated administrator can execute arbitrary commands as the web server user via a crafted filename in the app upgrade action.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Nov 2025
- **Updated:** 17 Nov 2025
- **Also known as:** GHSA-v7qq-g7hw-pj84

## What is CVE-2025-34239?

CVE-2025-34239 is a high-severity command injection vulnerability in Advantech WebAccess/VPN, published on 6 Nov 2025. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

Advantech WebAccess/VPN versions prior to 1.1.5 contain a command injection vulnerability in AppManagementController.appUpgradeAction() that allows an authenticated system administrator to execute arbitrary commands as the web server user (www-data) by supplying a crafted uploaded filename.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command)

## Which versions are affected by CVE-2025-34239?

It affects 1 product.


Products: Advantech Webaccess\/Vpn.

## How do I fix CVE-2025-34239?

No fix has been published for CVE-2025-34239 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34239 being exploited?

There is no known exploitation of CVE-2025-34239 in the wild and no public exploit code.

## Other vulnerabilities in Advantech WebAccess/VPN

- [CVE-2025-34240](https://insights.sbomify.com/CVE-2025-34240/): Advantech WebAccess/VPN < 1.1.5 SQL Injection via AppManagementController.appUpgradeAction() (high 8.6)
- [CVE-2025-34242](https://insights.sbomify.com/CVE-2025-34242/): Advantech WebAccess/VPN < 1.1.5 SQL Injection via AjaxNetworkController.ajaxAction() (high 8.6)
- [CVE-2025-34238](https://insights.sbomify.com/CVE-2025-34238/): Path traversal in WebAccess/VPN (medium 6.9)
- [CVE-2025-34237](https://insights.sbomify.com/CVE-2025-34237/): Advantech WebAccess/VPN < 1.1.5 Stored XSS via StandaloneVpnClientsController.addStandaloneVpnClientAction() (medium 6.3)
- [CVE-2025-34236](https://insights.sbomify.com/CVE-2025-34236/): Advantech WebAccess/VPN < 1.1.5 Stored XSS via NetworksController.addNetworkAction() (medium 6.2)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34239 and fix it if it is affected.

What it is: CVE-2025-34239 is a high-severity command injection vulnerability in Advantech WebAccess/VPN, published on 6 Nov 2025. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-34239 in the wild and no public exploit code.

Affected product: Advantech WebAccess/VPN. 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-2025-34239/ (Markdown: https://insights.sbomify.com/CVE-2025-34239/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34239
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34239
- OSV: https://osv.dev/vulnerability/CVE-2025-34239

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34239/
Summaries are generated and may contain mistakes; the official description above is the record.