# CVE-2025-27107: Integrated Scripting vulnerable to arbitrary code execution via Java reflection

> Attackers can execute arbitrary Java and native code on Minecraft servers by escaping the JavaScript sandbox via Java reflection in Integrated Scripting.

- **Severity:** High 8.6 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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:** 13 Mar 2025
- **Updated:** 13 Mar 2025
- **Also known as:** GHSA-2v5x-4823-hq77

## What is CVE-2025-27107?

CVE-2025-27107 is a high-severity code injection vulnerability in CyclopsMC IntegratedScripting, published on 13 Mar 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Integrated Scripting is a tool for creating scripts for handling complex operations in Integrated Dynamics. Minecraft users who use Integrated Scripting prior to versions 1.21.1-1.0.17, 1.21.4-1.0.9-254, 1.20.1-1.0.13, and 1.19.2-1.0.10 may be vulnerable to arbitrary code execution. By using Java reflection on a thrown exception object it's possible to escape the JavaScript sandbox for IntegratedScripting's Variable Cards, and leverage that to construct arbitrary Java classes and invoke arbitrary Java methods.
This vulnerability allows for execution of arbitrary Java methods, and by extension arbitrary native code e.g. from `java.lang.Runtime.exec`, on the Minecraft server by any player with the ability to create and use an IntegratedScripting Variable Card. Versions 1.21.1-1.0.17, 1.21.4-1.0.9-254, 1.20.1-1.0.13, and 1.19.2-1.0.10 fix the issue.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2025-27107?


## How do I fix CVE-2025-27107?

No fix has been published for CVE-2025-27107 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-27107 being exploited?

There is no known exploitation of CVE-2025-27107 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-27107 and fix it if it is affected.

What it is: CVE-2025-27107 is a high-severity code injection vulnerability in CyclopsMC IntegratedScripting, published on 13 Mar 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-27107 in the wild and no public exploit code.

Affected product: CyclopsMC IntegratedScripting. 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-2025-27107/ (Markdown: https://insights.sbomify.com/CVE-2025-27107/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-27107
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-27107
- OSV: https://osv.dev/vulnerability/CVE-2025-27107

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-27107/
Summaries are generated and may contain mistakes; the official description above is the record.