Critical Malicious Code Vulnerability in @medusajs/analytics-posthog Package
Summary
MAL-2025-191456: Malicious code in @medusajs/analytics-posthog (npm). Affects @medusajs/analytics-posthog versions 2.11.4-preview-20251124060135 – 2.11.4-preview-20251124090208. No fix is published. How to fix ↓
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Background
The @medusajs/analytics-posthog package is a JavaScript library designed for integrating PostHog analytics into Medusa.js applications. It facilitates tracking user interactions and events, providing insights into user behavior. However, recent findings have revealed that this package contains malicious code, posing significant security risks to any system utilizing it.
Vulnerability Detail
The vulnerability originates from the presence of embedded malicious code within the @medusajs/analytics-posthog package. This code can compromise any computer that has the package installed, potentially allowing unauthorized access to sensitive information such as secrets and keys. The malicious nature of this code is classified under CWE-506, indicating that it appears to be intentionally harmful. Users are advised to treat any system running this package as fully compromised.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall @medusajs/analytics-posthogIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a workaround, users should uninstall the @medusajs/analytics-posthog package using the command: npm uninstall @medusajs/analytics-posthog. Additionally, ensure that all sensitive information is secured and rotated to prevent unauthorized access.
Conclusion
The discovery of malicious code within the @medusajs/analytics-posthog package poses a serious threat to users and their systems. Immediate action is required to mitigate risks, including uninstalling the package and securing sensitive information. Users are encouraged to stay informed about updates and potential patches.
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FAQ
Immediately uninstall the package and rotate any secrets or keys stored on the affected system.
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Currently, there is no patch available for the malicious version of the package. The best course of action is to remove the package entirely.
Failure to address this vulnerability may result in unauthorized access to sensitive data and complete system compromise.
It is advisable to avoid using this package until a verified and secure version is released.
