Malicious Code Injection in tory_mandrill_z3n Package - npm Vulnerability

tory_mandrill_z3n Updated 18 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-109771: Malicious code in tory_mandrill_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The tory_mandrill_z3n package is part of the npm ecosystem, which is widely used for JavaScript package management. This package is associated with the tea.xyz token reward campaign, which has been known to flood the npm registry with malicious packages. The primary function of these packages is to manipulate the npm registry for token rewards, but they also pose significant security risks due to their malicious payloads.

Vulnerability Detail

The vulnerability in the tory_mandrill_z3n package originates from its association with a campaign that deploys malicious scripts designed to inflate developer reputation scores. These scripts modify the package.json file by removing private flags, altering version numbers, and generating random package names. This behavior leads to the continuous republishing of variants that pollute the npm registry, potentially compromising the integrity of the ecosystem and affecting developers who rely on these packages.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall tory_mandrill_z3n

If 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 workaround, you can monitor your project for any unintended changes made by the malicious package. Regularly review your package.json and package-lock.json files for any unauthorized modifications. Additionally, consider using tools like Vulert to monitor your dependencies for vulnerabilities without requiring code access.

Conclusion

The tory_mandrill_z3n package poses a significant security risk due to its malicious code that alters package metadata and floods the npm registry. It is crucial for developers to remove this package and monitor their dependencies to maintain the integrity of their projects.

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FAQ

The tory_mandrill_z3n package is an npm package that is part of a malicious campaign aimed at manipulating the npm registry for token rewards.

The vulnerability can lead to unauthorized changes in your package.json, potentially compromising your project's integrity and security.

You should uninstall the tory_mandrill_z3n package immediately using the command npm uninstall tory_mandrill_z3n.

Regularly audit your dependencies, use trusted packages, and employ tools like Vulert to monitor for vulnerabilities in real-time.

Vulert is a tool that monitors your package-lock.json file for open-source vulnerabilities in real-time. You can check if your application is affected by visiting the Vulert playground at Vulert Scanner.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall tory_mandrill_z3n

If 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 →

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