Malicious Code Detected in flowcrypt-browser Package
Summary
MAL-2025-20718: Malicious code in flowcrypt-browser (npm). Affected versions are not published. No fix is published. How to fix ↓
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Background
The flowcrypt-browser package is an npm library designed for secure email communication, enabling users to send and receive encrypted messages. It is widely used for its ease of integration with existing email services and its focus on privacy. However, recent findings have revealed that this package contains malicious code, posing significant risks to users and their data.
Vulnerability Detail
The vulnerability originates from the inclusion of malicious code within the flowcrypt-browser package. This code can potentially compromise user data, leading to unauthorized access and exploitation of sensitive information. The malicious nature of this code raises serious concerns regarding the integrity and security of applications utilizing this package, as it can be exploited by attackers to perform harmful actions without user consent.
How To Fix
This package is malicious. Remove it and rotate any credentials it could have accessed.
npm uninstall flowcrypt-browserIf it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.
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Workaround
As a temporary workaround, consider removing the flowcrypt-browser package from your project until a secure version is released. You can do this by executing: npm uninstall flowcrypt-browser. Additionally, monitor your application for any unusual behavior that may indicate exploitation of this vulnerability.
Conclusion
The discovery of malicious code in the flowcrypt-browser package highlights the importance of regularly monitoring and updating dependencies in software projects. Users are advised to take immediate action to mitigate risks associated with this vulnerability by updating or removing the affected package.
See every vulnerability recorded for flowcrypt-browser →
FAQ
The flowcrypt-browser package is an npm library that facilitates secure email communication through encryption, allowing users to send and receive protected messages.
The malicious code found in the flowcrypt-browser package can compromise user data and lead to unauthorized access, posing significant security risks.
You can use Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected without requiring any signup.
If you cannot update the package right away, consider removing it from your project as a temporary measure and monitor for any suspicious activity.
Detailed information about this vulnerability can be found on the GitHub repository of the malicious packages project, specifically at the link provided in the vulnerability details.
