Malicious Code Injection in particular_deer_z3n: A Threat to npm Packages
Summary
MAL-2025-95848: Malicious code in particular_deer_z3n (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 package 'particular_deer_z3n' is part of a series of npm packages that emerged during the tea.xyz token reward campaign. These packages are designed to inflate developer reputation scores by automatically generating and publishing derivative packages with randomized names. This behavior poses a significant risk to the integrity of the npm registry and can lead to the proliferation of malicious software.
Vulnerability Detail
The vulnerability in 'particular_deer_z3n' originates from its association with scripts that modify the package.json file to remove private flags, alter version numbers, and generate random package names. This malicious behavior allows the package to continuously republish variants, polluting the npm registry and potentially compromising the security of applications that depend on it. The presence of such packages can lead to unauthorized access, data breaches, and a loss of trust in the npm ecosystem.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall particular_deer_z3nIf 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 package dependencies using tools like Vulert. By utilizing Vulert's playground at https://vulert.com/scanner, you can check if your application is affected by this vulnerability without requiring any signup. This allows you to stay informed about potential threats in real-time.
Conclusion
The 'particular_deer_z3n' package poses a serious threat due to its malicious code that modifies package configurations and repopulates the npm registry with potentially harmful variants. It is essential to remove this package and utilize monitoring tools like Vulert to safeguard your applications against such vulnerabilities.
See every vulnerability recorded for particular_deer_z3n →
FAQ
'particular_deer_z3n' is an npm package associated with the tea.xyz token reward campaign, which aims to inflate developer reputation scores.
The vulnerability allows malicious code to modify your package.json, potentially leading to unauthorized access and data breaches.
You should uninstall the package immediately using the command: npm uninstall particular_deer_z3n.
Regularly update your dependencies and use tools like Vulert to monitor for vulnerabilities in your packages.
Yes, you can use Vulert's playground at Vulert Scanner to check for vulnerabilities in your application without any signup.
