Critical Malicious Code Vulnerability in remark-stringify10 Package

remark-stringify10 Updated 03 Dec 2025

Summary

03/12/2025
CRITICAL
No i
Critical
Not published

MAL-2025-192253: Malicious code in remark-stringify10 (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The remark-stringify10 package is a JavaScript library used in the Node.js ecosystem, primarily for converting Markdown content into a string format. It is widely utilized in projects that require Markdown processing and manipulation. However, this package has been identified to contain malicious code, posing significant security risks to applications that depend on it.

Vulnerability Detail

The vulnerability in the remark-stringify10 package originates from the inclusion of malicious code that can compromise the security of applications using this library. This code can lead to unauthorized access, data breaches, or other malicious activities. The vulnerability affects all versions of the package, making it critical for developers to take immediate action to mitigate the risks associated with its use.

How To Fix

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

npm uninstall remark-stringify10

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 temporary measure, you can avoid using the remark-stringify10 package altogether and look for alternative libraries that provide similar functionality without the associated risks. Additionally, consider implementing security measures such as input validation and sanitization to mitigate potential threats.

Conclusion

The discovery of malicious code in the remark-stringify10 package highlights the importance of maintaining secure coding practices and regularly monitoring dependencies for vulnerabilities. Developers must take proactive steps to mitigate risks by updating or replacing affected packages and utilizing tools like Vulert for ongoing security assessments.

See every vulnerability recorded for remark-stringify10 →

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FAQ

The malicious code can potentially allow unauthorized access to sensitive data or execute harmful actions within the application.

You can use Vulert, which monitors and alerts for open-source vulnerabilities in real-time. Visit Vulert Scanner to check if your application is affected without any signup.

If an immediate update is not feasible, consider implementing security workarounds and monitoring your application for unusual activities.

Yes, there are several alternative libraries available for Markdown processing that do not have known vulnerabilities. Research and select a library that meets your project's needs.

Regularly check your dependencies for updates and use tools like Vulert to receive real-time alerts about vulnerabilities in your open-source packages.

How To Fix

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

npm uninstall remark-stringify10

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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