The Silent Email Theft: How a Malicious Postmark MCP Package Compromised Thousands of Users
A sophisticated supply chain attack involving a malicious package on the npm registry, which mimicked the legitimate Postmark MCP server to silently steal user email communications for about a week. The initial text explains how the package established trust through numerous clean versions before introducing a single line of code in version 1.0.16 to exfiltrate sensitive data, including authentication credentials and financial communications. Furthermore, the documents outline the scope of the data compromise, potential warning signs developers should have noticed, and comprehensive prevention strategies like rigorous code review and dependency monitoring. Finally, the text introduces Technijian, a managed IT services provider, which uses this incident as a case study to market its security auditing and incident response services to businesses across Southern California. ... Read More
