# CVE-2025-34238: Path traversal in WebAccess/VPN

> An authenticated network administrator can exploit a path traversal vulnerability to read arbitrary files accessible by the web user.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/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-mhv6-73gf-63qx

## What is CVE-2025-34238?

CVE-2025-34238 is a medium-severity path traversal 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 an absolute path traversal via AjaxStandaloneVpnClientsController.ajaxDownloadRoadWarriorConfigFileAction() that allows an authenticated network administrator to cause the application to read and return the contents of arbitrary files the web user (www-data) can access.

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

## Which versions are affected by CVE-2025-34238?

It affects 1 product.


Products: Advantech Webaccess\/Vpn.

## How do I fix CVE-2025-34238?

No fix has been published for CVE-2025-34238 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34238 being exploited?

There is no known exploitation of CVE-2025-34238 in the wild and no public exploit code.

## Other vulnerabilities in Advantech WebAccess/VPN

- [CVE-2025-34239](https://insights.sbomify.com/CVE-2025-34239/): Advantech WebAccess/VPN < 1.1.5 Command Injection in AppManagementController.appUpgradeAction() (high 8.6)
- [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-2025-34237](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-2025-34238 and fix it if it is affected.

What it is: CVE-2025-34238 is a medium-severity path traversal 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-2025-34238 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-2025-34238/ (Markdown: https://insights.sbomify.com/CVE-2025-34238/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34238
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34238
- OSV: https://osv.dev/vulnerability/CVE-2025-34238

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-34238/
Summaries are generated and may contain mistakes; the official description above is the record.