# CVE-2023-39967: Full read and controlled SSRF through URL parameter when testing a request inside wiremock-studio

> Attackers can exploit SSRF in WireMock Studio to access internal services and read data via controlled URL parameters in request testing features.

- **Severity:** Critical 10.0 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Sep 2023
- **Updated:** 26 Sep 2024

## What is CVE-2023-39967?

CVE-2023-39967 is a critical server-side request forgery vulnerability in wiremock, published on 6 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

WireMock is a tool for mocking HTTP services. When certain request URLs like “@127.0.0.1:1234" are used in WireMock Studio configuration fields, the request might be forwarded to an arbitrary service reachable from WireMock’s instance. There are 3 identified potential attack vectors: via “TestRequester” functionality, webhooks and the proxy mode. As we can control HTTP Method, HTTP Headers, HTTP Data, it allows sending requests with the default level of credentials for the WireMock instance. The vendor has discontinued the affected Wiremock studio product and there will be no fix. Users are advised to find alternatives.

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

## Which versions are affected by CVE-2023-39967?

It affects 1 product.


Products: Wiremock Studio.

## How do I fix CVE-2023-39967?

No fix has been published for CVE-2023-39967 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-39967 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-39967 exists.

## Other vulnerabilities in wiremock

- [CVE-2023-41327](https://insights.sbomify.com/CVE-2023-41327/): Controlled SSRF through URL in the WireMock (medium 4.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-39967 and fix it if it is affected.

What it is: CVE-2023-39967 is a critical server-side request forgery vulnerability in wiremock, published on 6 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-39967 exists.

Affected product: wiremock. 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-2023-39967/ (Markdown: https://insights.sbomify.com/CVE-2023-39967/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-39967
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-39967
- OSV: https://osv.dev/vulnerability/CVE-2023-39967

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-39967/
Summaries are generated and may contain mistakes; the official description above is the record.