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.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
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
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.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2025-27107 being exploited?
There is no known exploitation of CVE-2025-27107 in the wild and no public exploit code.
Sources
Also known as GHSA-2v5x-4823-hq77.