Malicious Code Detected in @posthog/currency-normalization-plugin - Security Alert
Summary
MAL-2025-190874: Malicious code in @posthog/currency-normalization-plugin (npm). Affects @posthog/currency-normalization-plugin versions 0.0.8. No fix is published. How to fix ↓
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Background
The @posthog/currency-normalization-plugin is an npm package designed to normalize currency values for applications using PostHog analytics. It aims to provide developers with a reliable way to handle currency conversions and formatting. However, this package has been identified as containing malicious code, posing a significant risk to applications that utilize it.
Vulnerability Detail
The vulnerability originates from the discovery of malicious code within the @posthog/currency-normalization-plugin package. This code can potentially compromise the security of applications that depend on it, leading to unauthorized access, data breaches, or other malicious activities. The specific version affected is 0.0.8, and it has been flagged by Amazon Inspector as containing harmful elements.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall @posthog/currency-normalization-pluginIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
If immediate updating is not feasible, consider removing the @posthog/currency-normalization-plugin from your project until a secure version is available. You can do this by running: npm uninstall @posthog/currency-normalization-plugin. Additionally, monitor your application for any unusual activity that may arise from the use of this package.
Conclusion
The @posthog/currency-normalization-plugin has been flagged for containing malicious code, which poses a serious risk to applications that utilize it. It is essential to update or remove the package to safeguard your application from potential threats. Regular monitoring and using tools like Vulert can help maintain the security of your software.
See every vulnerability recorded for @posthog/currency-normalization-plugin →
FAQ
It is an npm package that helps developers normalize currency values for analytics in PostHog applications.
The malicious code was identified by Amazon Inspector during a security assessment of the package.
Using the affected version (0.0.8) can lead to security vulnerabilities, including unauthorized access and data breaches.
You can use Vulert, which monitors open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without needing to sign up.
Consider removing the package from your project and monitoring for any unusual activity until a secure version is available.
