Malicious Code Injection in tusya-fsefss-ss3da Package - npm Vulnerability
Summary
MAL-2025-169421: Malicious code in tusya-fsefss-ss3da (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 tusya-fsefss-ss3da package is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. This package is designed to facilitate the automatic generation and publication of derivative packages, which can inflate developer reputation scores for token rewards. However, it has been identified as containing malicious code that compromises its integrity and the security of the npm registry.
Vulnerability Detail
The vulnerability originates from the package's malicious payload, which modifies the package.json file to remove private flags, alters version numbers, and generates random package names. This behavior leads to the continuous republishing of variants, polluting the npm registry and potentially affecting other packages and developers relying on the integrity of the npm ecosystem. The malicious scripts included in the package are designed to automate these processes, making it difficult for developers to detect the issue.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall tusya-fsefss-ss3daIf 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 package from your project by running the following command: npm uninstall tusya-fsefss-ss3da. Additionally, consider using a tool like Vulert to monitor your package-lock.json file for vulnerabilities in real-time.
Conclusion
The tusya-fsefss-ss3da package has been identified as containing malicious code that poses a significant risk to developers and the npm ecosystem. It is essential to remove this package and monitor your dependencies for vulnerabilities to ensure the security of your projects.
See every vulnerability recorded for tusya-fsefss-ss3da →
FAQ
The tusya-fsefss-ss3da package is an npm package associated with the tea.xyz token reward campaign, designed to generate and publish derivative packages.
The malicious code modifies your package.json file, removes private flags, and can lead to the pollution of the npm registry, potentially affecting other packages.
You should uninstall the tusya-fsefss-ss3da package immediately and monitor your project for any further vulnerabilities.
Yes, you can use Vulert, which monitors your package-lock.json file for vulnerabilities in real-time without requiring code access or installation.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
