Malicious Code Injection in entitled_cuckoo-silentdev Package
Summary
MAL-2025-102131: Malicious code in entitled_cuckoo-silentdev (npm). Affected versions are not published. No fix is published. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
The entitled_cuckoo-silentdev package is part of the npm ecosystem, primarily used for JavaScript development. It is associated with the tea.xyz token reward campaign, which has been known to flood the npm registry with packages that inflate developer reputation scores. This package, like others in its category, is designed to automate the generation and publication of derivative packages, which can lead to significant pollution of the npm registry.
Vulnerability Detail
The vulnerability originates from malicious code embedded within the entitled_cuckoo-silentdev package. This code modifies the package.json file to remove private flags, alters version numbers, and generates random package names, primarily themed around Indonesian culture. The malicious payload continuously republishes these variants, which can lead to a polluted npm registry and potentially compromise the integrity of projects relying on this package.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall entitled_cuckoo-silentdevIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →
Workaround
As a temporary workaround, you can remove the entitled_cuckoo-silentdev package from your project by executing: npm uninstall entitled_cuckoo-silentdev. This will prevent any malicious code from executing in your environment until a fix is available.
Conclusion
The entitled_cuckoo-silentdev package contains a serious vulnerability due to malicious code that modifies project files and repopulates the npm registry with harmful packages. It is crucial to update or remove this package to protect your project from potential threats.
See every vulnerability recorded for entitled_cuckoo-silentdev →
FAQ
It is an npm package associated with the tea.xyz token reward campaign, designed to automate the generation of derivative packages.
The vulnerability can lead to the pollution of the npm registry and may compromise the integrity of your project by introducing malicious code.
You should update the package to a patched version or remove it from your project to mitigate the risk.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time using just your package-lock.json file.
Yes, you can use the Vulert playground at Vulert Scanner to check for vulnerabilities in your application without any signup.
