Here is a summary of the key points from the blog post in complete sentences:

The previous blog post covered common vulnerabilities in AWS Lambda functions and best practices for securing them. This article applies that theory to concrete vulnerable serverless application examples using the OWASP Damn Vulnerable Serverless Application (DVSA). The DVSA contains intentional vulnerabilities to demonstrate exploits. One example involves injecting code into a Lambda via API Gateway to exfiltrate environment variables. The leaked AWS credentials enabled accessing other functions and data. An AWS Web Application Firewall with default rules did not block the attack, but Amazon Inspector identified critical vulnerabilities in both dependencies and custom code. The analysis underscores the need for robust input validation, secure deserialization, and scanning to protect serverless applications.